Παραπομπή APA

McCullagh, P. (1979). Modern Concepts in Geomorphology. OUP.

Παραπομπή Chicago Style

McCullagh, Patrick. Modern Concepts in Geomorphology. Oxford: OUP, 1979.

Παραπομπή MLA

McCullagh, Patrick. Modern Concepts in Geomorphology. OUP, 1979.