Atkinson, John W.
D. Van Nostrand, 1978
Buku Teks
McClelland, David Clarence
Cambridge University Press, 1987
Buku Teks
edited by David C. McClelland
Appleton Century Crofts, 1955
Buku Teks
Reeve, Johnmarshall
John Wiley & Sons, Inc., 2015
Buku Teks
Petri, Herbert L
Cengage Learning, 2013
Buku Teks