APA استشهاد

Beaver, S., & Derbyshire, E. (1974). Structural geomorphology. Longman.

استشهاد بنمط شيكاغو

Beaver, S.H, و E. Derbyshire. Structural Geomorphology. London: Longman, 1974.

MLA استشهاد

Beaver, S.H, و E. Derbyshire. Structural Geomorphology. Longman, 1974.