APA (7e ed.) Bronvermelding

Worcester, P. G. (1969). Textbook of geomorphology (2nd ed.). Van Nostrand.

Chicago (17e ed.) Bronvermelding

Worcester, Philip G. Textbook of Geomorphology. 2nd ed. New york: Van Nostrand, 1969.

MLA (9e ed.) Bronvermelding

Worcester, Philip G. Textbook of Geomorphology. 2nd ed. Van Nostrand, 1969.