APA (7e ed.) Bronvermelding

Strahler, A. H., & Strahler, A. N. (1998). Introducing physical geography (2nd ed.). Wiley.

Chicago (17e ed.) Bronvermelding

Strahler, Alan H., en Arthur Newell Strahler. Introducing Physical Geography. 2nd ed. New York: Wiley, 1998.

MLA (9e ed.) Bronvermelding

Strahler, Alan H., en Arthur Newell Strahler. Introducing Physical Geography. 2nd ed. Wiley, 1998.