edited by Joel J. Lersier
Englewood Cliffs, N.J., Prentice-Hall
Buku Teks
Boone, Louis E., author
Dryden Press, 1996
Buku Teks
Boone, Louis E., author
Dryden Press, 1990
Buku Teks
Pride, William M., author
South Western Cengage Learning, 2012
Buku Teks
Walthall, Wylie A., author
Harper and Row, 1987
Buku Teks