Rathus, Spencer A., author
Belmont, CA, 2004
Buku Teks
Carlson, Neil R., author
Allyn and Bacon, [date of publication not identified]
Buku Teks
Miner, John B., author
McGraw-Hill, 1963
Buku Teks
Hardy, Malcolm
Erlangga, 1988
Buku Teks
Cox, Gill, author
Arcan, 1996
Buku Teks