APA (7e ed.) Bronvermelding

COLLIER'S ENCYCLOPEDIA, HALSEY, W. D. [., & JOHNSTON, B. [. (1989). Collier's encyclopedia vol.18. Macmillan Educational.

Chicago (17e ed.) Bronvermelding

COLLIER'S ENCYCLOPEDIA, William D. [edt.] HALSEY, en Bernard [edt.] JOHNSTON. Collier's Encyclopedia Vol.18. New York: Macmillan Educational, 1989.

MLA (9e ed.) Bronvermelding

COLLIER'S ENCYCLOPEDIA, et al. Collier's Encyclopedia Vol.18. Macmillan Educational, 1989.