APA-referens (7:e uppl.)

Klein, W. A. (2006). Federal income taxation (Fourteenth edition.). ASPEN Publishers.

Chicago-referens (17:e uppl.)

Klein, William A. Federal Income Taxation. Fourteenth edition. New York: ASPEN Publishers, 2006.

MLA-referens (9:e uppl.)

Klein, William A. Federal Income Taxation. Fourteenth edition. ASPEN Publishers, 2006.