Harvard Business School Press, 2001
Buku Teks
Wolk, Harry L.
PWS-Kent Publishing Company, 1988
Buku Teks
Schroede, Roger G
McGraw-Hill Book, 1985
Buku Teks
Thomson, Gerald, author
McGraw-Hill, 1976
Buku Teks
Hansen, Don R., author
South-Western College Publishing, 2000
Buku Teks