Zotero is a free research tool that allows you to easily organize references, create in-text citations and bibliographies, and much, much more!
Learn more at Zotero.org or visit the Smith Libraries guide to Zotero.
The New RefWorks (Version 3) offers a well-designed interface and many new features.
Visit the Libraries' Citation Tools page or more information on RefWorks 3.
The Jacobson Center for Writing, Teaching and Learning offers individual help with writing and also this useful guide:
Writing Papers: A Handbook for Students at Smith College
smith.edu/sites/default/files/media/Documents/Jacobson-Center/writing_papers.pdf
Read "Acknowledging and Documenting Your Sources" starting on page 57 (pg.67 of 96 in pdf file).