APA-referens (7:e uppl.)

Nelson, C. J., Dulio, D. A., & Medvic, S. K. (2002). Shades of gray: Perspectives on campaign ethics. The Brookings Institution.

Chicago-referens (17:e uppl.)

Nelson, Candice J., David A. Dulio, och Stephen K. Medvic. Shades of Gray: Perspectives on Campaign Ethics. Washington, D. C: The Brookings Institution, 2002.

MLA-referens (9:e uppl.)

Nelson, Candice J., et al. Shades of Gray: Perspectives on Campaign Ethics. The Brookings Institution, 2002.