McClelland, David Clarence
Cambridge University Press, 1987
Buku Teks
Atkinson, John W.
D. Van Nostrand, 1978
Buku Teks SO
Reeve, Johnmarshall
John Wiley & Sons, Inc., 2015
Buku Teks
edited by Chalmers L. Stacey and Manfred F. DeMartino
Howard Allen, 1958
Buku Teks
Petri, Herbert L
Cengage Learning, 2013
Buku Teks