Hughes, Robert James, 1946-, author
South-Western Cengage Learning, 2013
Buku Teks
Shubin, John A., author
Barnes & Noble, 1975
Buku Teks
Walthall, Wylie A., author
Harper and Row, 1987
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks
Bovee, Courtland L., author
Pearson/Prentice Hall, 2007
Buku Teks