Campbell, Donald T., author
Rand Mc Nally College Publisher, 1966
Buku Teks
Plutchik, Robert
Harper & Row , 1983
Buku Teks
Shaughnessy, John J., author
McGraw-Hill, 1997
Buku Teks
Shaughnessy, John J., author
McGraw-Hill, 2003
Buku Teks
Townsend, John C., author
McGraw-Hill , 1953
Buku Teks