Here are some reference links that you might find useful:

• Loyola Library  
• Project Gutenberg ~ a collection of thousands of books, including most of the "classics"  
• Project Bartleby ~ a collection of books in hypertext format, including a searchable Bartlett's Quotations, Strunk and White, and other books  
• The Library of Congress 
• The National Archives 
• How to cite sources on the internet 
• Eurodocs ~ an archive of primary historical documents in Europe 
• Help with MLA-style research papers through the English Department 

Resources for the core classes:

• A page of links on the Ancient World   
• Medieval World Links