Cita APA (7th ed.)

Strahler, A. H., & Strahler, A. (2002). Physical geography: Science and systems of the human environment (2nd ed.). John Wiley.

Cita Chicago (17th ed.)

Strahler, Alan H., i Arthur Strahler. Physical Geography: Science and Systems of the Human Environment. 2nd ed. Hoboken, NJ: John Wiley, 2002.

Cita MLA (8th ed.)

Strahler, Alan H., i Arthur Strahler. Physical Geography: Science and Systems of the Human Environment. 2nd ed. John Wiley, 2002.