Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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