Gaya APA

Swanson, C, P., Sills, D, L. (1968). International encyclopedia of the social sciences volume 13 . New York: New York: The Macmillan Co. & The Free Press; 1968.

Gaya MLA

Swanson, Carl, P.., Sills, David, L.. "International encyclopedia of the social sciences volume 13". New York: New York: The Macmillan Co. & The Free Press; 1968, 1968. Text.