Book of Quotations. Simpson's Contemporary Quotations by James Simpson is just one of many good collections of quotations. Use it when you need an attention-getting quote or when you are browsing for ideas. You can view Simpson's quotations online at http://www.bartleby.com/63/ (Simpson's Contemporary Quotations The Most Notable Quotations: 1950-1988 Compiled by James B. Simpson).

Here are some additional sources for quotations online.

http://www.quotationspage.com/
http://www.quoteland.com/
http://www.bartleby.com/100/ (Bartlett's Familiar Quotations)
http://www.aphids.com/quotes/index.shtml
http://www.aphids.com/quotes/index.shtml
http://www.quotablequotes.net/
http://www.quoteworld.org/
http://www.QuotationReference.com/