MLA

Guth, David W., and Charles Marsh. Public Relations : a Values-driven Approach : Cases Edition. 3rd ed. Boston [et al.]: Pearson, 2007.

APA

Guth, D. W., & Marsh, C. (2007). Public relations : a values-driven approach : cases edition. 3rd ed. Boston [et al.]: Pearson.

Chicago

Guth, David W., and Charles Marsh. Public Relations: A Values-Driven Approach : Cases Edition. 3rd ed. Boston [et al.]: Pearson, 2007.