Hemisphere Publishing Corporation, 1991
Buku Teks
Praeger , 1991
Buku Teks
editors, Longbing Cao, Philip S. Yu
Springer-Verlag , 2012
eBooks
edited by John P. Robinson, Phillip R. Shaver, Lawrence S. Wrightsman
Academic Press, 1991
Buku Teks
Krompf,Warren M.
American Management Association, 2009
eBooks