Try one of these citation generators for help with your bibliography :-

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At Research and Documentation Online you may download sample papers illustrating both MLA and APA styles.

Citing Work -   what, why, how, and examples in MLA style  

What : Most important are: Author, Title, Place of Publication, Producer/Publisher , Date of publication.

Why : So readers know where you got your information and can judge if it is authoritative and up to date. To acknowledge authorship/ownership of the material.

How : Your "Bibliography", list of "Works Cited" or "Works Consulted" should be -

Punctuation matters- a lot.

Examples of citations in MLA Style

Print sources, Electronic Sources, Quotations, Parenthetical referencing, MLA Guides, APA Guides

Print sources

Book

Clarke, Somers & Richard Engelbach. Ancient Egyptian Construction and Architecture . New York:

       Dover Publications, 1990

Encyclopedia Article

Fleischman, Andrew. "Dame Edith Sitwell." World Book (Vol.17, p.478). Chicago: World Book Inc.,

       2000

Journal Article

Poniewozik, Jan.  "Justice in the Blood." Time , 13 Nov. 2000: 54-55

Newspaper article- no author

"Affirmative Action." Wall Street Journal . 12 Feb. 1995: A3

Electronic resources: databases ...

You need both the details of the item AND how and when you accessed it. Many of these resources provide you with the citation.

Online Reference Books

Sanders, John W., "Navajo." Encyclopedia Americana. Grolier Online Available: 1 Apr. 2004

      <http://go/grolier.com>

Electronic Journals

Wiseman, David. "Computers: The Downside." Journal of Educational Technology . (October 15,

      1996) [Online serial] Available:   14 Nov. 2000 <http://borg.lib.vt.edu/>

Infotrac Article

Nichols, Rachel.W. "Biotech on the Farm". The Sciences , 40(4), July 2000: 4.   Expanded

       Academic Index ASAP Gale Group Databases. Available14 Nov. 2000

      <http://infotrac.galegroup.com>

LitFinder

Byron, George Gordon. "She Walks in Beauty." 1814. LitFinder , Thomson Gale Databases.

       Available 8 April 2004  <http://www.litfinder.com.>

NewsBank

Bradley, Pamela. "Bombing Raids Hit Home."  Boston Herald ,  December 5, 1997 :29.

      NewsBank Available14 Nov. 2003.  <http://infoweb.newsbank.com>

SIRS Knowledge Source

Ayres, Ed. "The Hidden Shame of the Global Industrial Economy." World Watch

      Jan/Feb. 2004: 20-29. SIRS Researcher . SIRS Knowledge Source. Available 7 April 2004

      <http://www.sirs.com>.

Web Pages with author

Pickering, Keith A. The Columbus Navigation Home page . 1998 . 14 Nov. 2000.

      <http://www1.minn.net/~keithp/>

Web Pages -no author .

Department of Labor's Strategic Plan FY 1999 - 2004 .  14 Nov. 2000. 

      <http://www.dol.gov/dol/_sec/public/stratplan/stratplan.htm>

MLA Quotations

A short quotation (<40 words)  should appear in the text "like this" (Author, Year, p#)

A long quotation (>40 words)  should appear in a separate block, indented,  with no quotation marks and (Author, Year, p#) after the closing punctuation mark.

MLA Parenthetical Referencing

This is what you put in the body of your text to connect it with a source in your works cited.
Examples :
Jones (2000) reported on the results...
In a recent study of MCAS results (Jones, 2000) it was .....
In 2000, Jones reported that....

For more examples in MLA style, try one of the following
Capital Community College: MLA Guide
Purdue University
University of Southern Mississippi

The official manual is The MLA Handbook for Writers of Research Papers (5th edition). In the CHS Library it is in the reference section with call number R 808 GIB.

There are guides on the APA style at:-
APA Online
Capital Community College APA Guide
University Of Southern Mississippi APA Guide
For all the rules, the official publication is The Publication Manual of the American Psychological Society (5th edition)