Santrock, John W., author
McGraw-Hil , 2005
Buku Teks
Fleming, C.M., author
Routledge and Kegan Paul, 1955
Buku Teks
Santrock, John W., author
University of Texas, 1990
Buku Teks
Steinberg, Laurence, author
McGraw-Hill, 1999
Buku Teks
Steinberg, Laurence, author
[publisher not identified], 1993
Buku Teks