Gaya APA

S., P, J., R., P, J. (1934). Mental Retardation : Nature, Needs, And Advocacy . New York: Allyn and Bacon.

Gaya MLA

S., Payne, James., R., Patton, James. "Mental Retardation : Nature, Needs, And Advocacy". New York: Allyn and Bacon, 1934. Text.