Walters, Joel
Lawrence Erlbaum Associates, 2005
Buku Teks
Osgood, Berrien Cornelius
The Ronald Pres Company, 1951
Buku Teks
Osgood, Carl C.
Pergamon Press, 1982
Buku Teks
edited by Marianne Hundt, Sandra Mollin, Simone E. Pfenninger
Cambridge University Press, 2017
Buku Teks SO
Modden, David
New York, Twayne, 1964
Buku Teks