Fleming, C.M.
Routledge and Kegan Paul, 1955
Buku Teks
Santrock, John W.
University of Texas, 1990
Buku Teks
Steinberg, Laurence
McGraw-Hill, 1999
Buku Teks
Steinberg, Laurence
[publisher not identified], 1993
Buku Teks
Steinberg, Laurence
McGraw-Hill, 2002
Buku Teks