Gravetter, Frederick J., author
Wadsworth and Cengage Learning, 2009
Buku Teks
Gravetter, Frederick J., author
Wadsworth and Cengage Learning, 2013
Buku Teks
Edwards, Allen L., author
Holt, Rinehart and Winston, 1966
Buku Teks
Kimmel, Allan J., author
Blackwell Publishing, 2007
Buku Teks
Wagner, William E., author
Pine Forge Press, 2007
Buku Teks