Schwartz, Barry, author
W.W. Norton, 1991
Buku Teks
Lutz, John, author
Waveland Press, 2005
Buku Teks
Stein, Donald G., author
Macmillan, 1974
Buku Teks
Lieberman, David A., author
Thomson Wadsworth, 2004
Buku Teks
the American Psychological Association, 2018
Majalah, Jurnal, Buletin