Graham, H. T
Pitman , 1986
Buku Teks
Arthur, Diane, author
American Management Association;, 2001
eBooks
Carrell, Michael R., author
Irwin, 1984
Buku Teks
Werther, William B., author
McGraw-Hill, 1993
Buku Teks
Mondy, R. Wayne, author
Prentice-Hall, 2002
Buku Teks