Anderson, David
South-Western College Publishing, 2000
Buku Teks
Levin, Richard I., author
McGraw-Hill International Book Company, 1982
Buku Teks
Levin, Richard I., author
McGraw-Hill, 1986
Buku Teks
Levin, Richard I., author
New York, NY, McGraw-Hill
Buku Teks
Stevenson, William J., author
Irwin , 1992
Buku Teks