Pride, William M., author
South Western Cengage Learning, 2012
Buku Teks
Hughes, Robert James, 1946-, author
South-Western Cengage Learning, 2013
Buku Teks
Shubin, John A., author
Barnes & Noble Books, 1957
Buku Teks
Daniels, John D.
PWS-Kent Publishing, 1993
Buku Teks
Prescott, David
Harcourt Brace Jovanovich, 1993
Buku Teks