APA-viite (7. p.)

McKnight, T. L., & Hess, D. (2009). Physical geography (9th ed., California ed.). Pearson Education.

Chicago-viite (17. p.)

McKnight, Tom L., ja Darrel Hess. Physical Geography. 9th ed., California ed. New York: Pearson Education, 2009.

MLA-viite (9. p.)

McKnight, Tom L., ja Darrel Hess. Physical Geography. 9th ed., California ed. Pearson Education, 2009.