APA (7e ed.) Bronvermelding

JOHNSON, M. S. [. a. (1977). Keystone. American Book Co.

Chicago (17e ed.) Bronvermelding

JOHNSON, M. Seddon [et al]. Keystone. New York: American Book Co, 1977.

MLA (9e ed.) Bronvermelding

JOHNSON, M. Seddon [et al]. Keystone. American Book Co, 1977.