Merrill, Harwood
New York, N.Y., American Management Association, Inc
Buku Teks
Steckle, Lynde C
Harper & Row , 1958
Buku Teks
New York, N.Y., National Foreman's Institute.Inc
Buku Teks
Ivancevich, John M., author
Irwin, 1995
Buku Teks
Fisher, Cynthia D., author
Houghton Mifflin, 1990
Buku Teks