Leavitt, Harold J., author
University of Chicago Press, 1958
Buku Teks
Lowman, Rodney L., author
American Psychological Association, 2016
Buku Teks
Sayles, Leonard R., author
McGraw-Hill , 1964
Buku Teks
Savage, Christopher I., author
Hutchinson, 1975
Buku Teks
Speight, H., author
Macmillan, 1970
Buku Teks