APA استشهاد

Steers, J. A. (1932). The Unstable earth: : some recent views in geomorphology. Methuen & Co.

استشهاد بنمط شيكاغو

Steers, J. A. The Unstable Earth: : Some Recent Views in Geomorphology. London: Methuen & Co, 1932.

MLA استشهاد

Steers, J. A. The Unstable Earth: : Some Recent Views in Geomorphology. Methuen & Co, 1932.