Zikmund, William G., author
South-Western, Cengage Learning, 2010
Buku Teks
Green, Paul E., author
Prentice-Hall, 1970
Buku Teks
Malhotra, Naresh K., author
Pearson India Education, 2016
Buku Teks
Boyd, Harper W., Jr., author
Richard D. Irwin, 1977
Buku Teks
Kinnear, Thomas C., 1943-, author
McGraw-Hill, 1996
Buku Teks