APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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