Παραπομπή APA

Strahler, A. H., & Strahler, A. N. (1992). Modern physical geography (4th.). John Wiley & Sons.

Παραπομπή Chicago Style

Strahler, Alan H., και Arthur N. Strahler. Modern Physical Geography. 4th. Canada: John Wiley & Sons, 1992.

Παραπομπή MLA

Strahler, Alan H., και Arthur N. Strahler. Modern Physical Geography. 4th. John Wiley & Sons, 1992.