edited by Chalmers L. Stacey and Manfred F. DeMartino
Howard Allen, 1958
Buku Teks
McClelland, David Clarence, author
Cambridge University Press, 1987
Buku Teks
Reeve, Johnmarshall, author
John Wiley & Sons, Inc., 2015
Buku Teks
Buck, Ross, author
John Wiley & Sons, 1988
Buku Teks
Hyde, Janet Shibley, author
McGraw-Hill, 1983
Buku Teks