APA (7e ed.) Bronvermelding

Young, E. W. (1973). The world, physical and human (3rd ed.). E. Arnold.

Chicago (17e ed.) Bronvermelding

Young, Eric William. The World, Physical and Human. 3rd ed. London: E. Arnold, 1973.

MLA (9e ed.) Bronvermelding

Young, Eric William. The World, Physical and Human. 3rd ed. E. Arnold, 1973.