APA Style

Collier's encyclopedia VOL.6. (1990). New York: MACMILLAN EDUCATIONAL COMPANY.

Chicago Style

Collier's encyclopedia VOL.6. . New York: MACMILLAN EDUCATIONAL COMPANY, 1990. .

MLA Style

Collier's encyclopedia VOL.6. . New York: MACMILLAN EDUCATIONAL COMPANY, 1990. .

Turabian Style

Collier's encyclopedia VOL.6. New York: MACMILLAN EDUCATIONAL COMPANY, 1990. .