The Dryden Press, 1981
Buku Teks
Harcourt Brace Jovanovich Publishers, 1991
Buku Teks
Warren, Carl S., author
International Thomson, 1999
Buku Teks
Gray, Jack, author
McGraww-Hill, 1982
Buku Teks
Reeve, James M., 1953-, author
South Western Cengage Learning, 2012
Buku Teks