Plutchik, Robert
Harper & Row , 1983
Buku Teks
Solso, Robert L., 1933-, author
Boston, 2002
Buku Teks
Boring, Edwin G., author
Appleton, 1942
Buku Teks
McGuigan, F.J. (Frank J.), 1924-
Prentice-Hall, 1990
Buku Teks
Robinson, Paul W., 1942-
Prentice-Hall, 1981
Buku Teks