Boyd, Harper W., Jr., author
Irwin, 1995
Buku Teks
Cravens, David W., author
McGraw-Hill Irwin, 2002
Buku Teks
Kerin, Roger A., author
Prentice Hall international, 2001
Buku Teks
Busch, Paul S
Richard D.Irwin, 1975
Buku Teks
Howard, John A., author
Richard D. Irwin, 1973
Buku Teks