edited by Chalmers L. Stacey and Manfred F. DeMartino
Howard Allen, 1958
Buku Teks
Atkinson, John W.
D. Van Nostrand, 1978
Buku Teks SO
edited by David C. McClelland
Appleton Century Crofts, 1955
Buku Teks SO
Reeve, Johnmarshall
John Wiley & Sons, Inc., 2015
Buku Teks
Petri, Herbert L
Cengage Learning, 2013
Buku Teks