edited by Sigmund Koch, David E. Leary
APA, 2006
Buku Teks
edited by Sigmund Koch, David E. Leary
McGraw-Hill, 1985
Buku Teks
Carlson, Neil R., author
Allyn and Bacon, [date of publication not identified]
Buku Teks
Carlson, Neil R., author
[publisher not identified], 1997
Buku Teks
Santrock, John W., author
W.C. Brown Publisher, 1991
Buku Referensi