Auger, B.Y.
America Manufacturing Company , 1972
Buku Teks
Tator, Rosemary, author
[American Management Association, ], 2011
eBooks
Marsh, Philip Michael
Grasindo, 2007
Buku Teks
Lip, Evelyn, author
Times Book International , 1995
Buku Teks
Khan, Badrul H, author
Information Science Publishing, 2005
Buku Teks