Gaya APA

L, S, , D. (1972). International Encyclopedia of the Social Sciences Volume 15 16 17 (Soci to Zoo) . New York: Macmillan.

Gaya MLA

L, Sills, , David. "International Encyclopedia of the Social Sciences Volume 15 16 17 (Soci to Zoo)". New York: Macmillan, 1972. Text.