Mina, Eli, author
[American Management Association;, ], 2002
eBooks
Munter, Mary, author
Prentice-Hall, 2002
Buku Teks
Rae, Leslie
McGraw-Hill, 1994
Buku Referensi
Auger, B.Y.
America Manufacturing Company , 1972
Buku Teks
Hammond, John S., 1937-, author
Harvard Business School, 1999
Buku Teks