DuBrin, Andrew J., author
Business Publications, 1982
Buku Teks
Ivancevich, John M., author
McGraw-Hill, 2014
Buku Teks
Cook, Curtis W., author
Irwin, 1997
Buku Teks
Cook, Curtis W., author
McGraw-Hill, 2001
Buku Teks
Hersey, Paul, author
Pearson, Prentice Hall, 2008
Buku Teks