Gaya APA

WHITAKER, W, H., FEDERICO, R, C. (1990). Social welfare in today's world (2nd ed.). New York: The McGrasw-Hill Companies.

Gaya MLA

WHITAKER, William, H.., FEDERICO, Ronald, C.. "Social welfare in today's world". 2nd ed. New York: The McGrasw-Hill Companies, 1990. Text.