Homan, Roger
Longman, 1991
Buku Teks
Kimmel, Allan J., author
Blackwell, 2007
Buku Teks
Reynolds, Paul Davidson, author
Prentice-Hall, 1982
Buku Teks
Koocher, Gerald P., author
Oxford University Press, 1998
Buku Teks
Reamer, Frederic G., author
Columbia University Press, 1999
Buku Teks