Stewart, Rosemary, author
Macmillan, 1993
Buku Teks
Chambers, John C. (John Carlton), 1928-, author
John Wiley & Sons, 1974
Buku Teks
Cadwell, Charles M., author
[American Management Association, ], 2004
eBooks
Stettner, Morey, author
McGraw-Hill, 2000
Buku Teks
Taylor, James, author
American Management Association, 2006
eBooks