Gaya APA

Sellin, D, F. (1979). Mental Retardation: Nature,Need,and Advocacy (Ed. 1). Boston: Allyn And Bacon, Inc..

Gaya MLA

Sellin, Donald, F.. "Mental Retardation: Nature,Need,and Advocacy". Ed. 1 Boston: Allyn And Bacon, Inc., 1979. Text.