APA-viite (7. p.)

Pfennig, D. W., & Pfennig, K. S. (2012). Evolution's wedge: Competition and the origins of diversity. University of California Press.

Chicago-viite (17. p.)

Pfennig, David W., ja Karin S. Pfennig. Evolution's Wedge: Competition and the Origins of Diversity. Berkeley: University of California Press, 2012.

MLA-viite (9. p.)

Pfennig, David W., ja Karin S. Pfennig. Evolution's Wedge: Competition and the Origins of Diversity. University of California Press, 2012.