Follow the basic format for print books but also include the URL or the name of the database. The ‘accessed date’ should ONLY be included ONLY a publication date or date the source was last modified (or updated) is not listed in the website information. The access date helps readers access the source. (15.4.1.5).
General Format
Footnote:
Superscript Note Number Author First Name/Initial Last Name, Book Title: Subtitle (Place of Publication: Publisher, Year), page #(s) (Chapter or Section Number if no page number), URL (accessed Month Day, Year ONLY if date of publication is not available).
Bibliographic Entry:
Author Last Name, First Name or Initial. Book Title: Subtitle. Place of Publication: Publisher, Year. URL (accessed Month Day, Year ONLY if date of publication is not available).
Examples
Footnote (with and without 'Accessed Date'):
Option #1 -- If you include the url and you do not have page numbers.
2 Philip B. Kurland and Ralpher Lerner, eds., The Founders' Constitution (Chicago: University of Chicago Press, 1987), http://press-pubs.uchicago.edu/founders.
2 Philip B. Kurland and Ralpher Lerner, eds., The Founders' Constitution (Chicago: University of Chicago Press), accessed June 27, 2006, http://press-pubs.uchicago.edu/founders.
Note: Many e-book formats lack fixed page numbers, therefore cite by chapter or section number or, if these are unnumbered, by the name of the chapter or section.
2 Fyodor Dostoevsky, Crime and Punishment, trans. Constance Garnett (Project Gutenberg, last updated November 5, 2012), pt.6, chap.1, http://gutenberg.org/files/2554/2554-h/2554-h.htm.
Option #2-- If you consulted the book in a library or commercial database, you may give the name of the database instead and include page numbers.
2 Joseph P. Quinlan, The Last Economic Superpower: The Retreat of Globalization, the End of American Dominance, and What We Can Do about It (New York: McGraw-Hill, 2010), 211, ProQuest Ebook Central.
2 Joseph P. Quinlan, The Last Economic Superpower: The Retreat of Globalization, the End of American Dominance, and What We Can Do about It (New York: McGraw-Hill), 211, accessed November 1, 2011, ProQuest Ebook Central.
Bibliographic Entry:
Kurland, Philip B., and Ralph Lerner, eds. The Founders' Constitution. Chicago: University of Chicago Press, 1987. http://press-pubs.uchicago.edu/founders/.
Kurland, Philip B., and Ralph Lerner, eds. The Founders' Constitution. Chicago: University of Chicago Press. Accessed June 27, 2006. http://press-pubs.uchicago.edu/founders/.
Dostoevsky, Fyodor. Crime and Punishment. Translated by Constance Garnett. Edited by William Allan Neilson. New York: P.F. Collier, 1917. http://gutenberg.org/files/2554/2554-h/2554-h.htm.
Option #2 (Be consistent with your footnote option. See conditions for Option 2 above):
Quinlan, Joseph P. The Last Economic Superpower: The Retreat of Globalization, the End of American Dominance, and What We Can Do about It. New York: McGraw-Hill, 2010. ProQuest Ebook Central.
Quinlan, Joseph P. The Last Economic Superpower: The Retreat of Globalization, the End of American Dominance, and What We Can Do about It. New York: McGraw-Hill. Accessed November 1, 2011. ProQuest Ebook Central.