Snowman, Jack, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Biehler, Robert F.
Houghton Miffiln, [date of publication not identified]
Buku Teks
Wilson, John A. R., author
McGraw-Hill, 1974
Buku Teks
Elliott, Stephen N.
McGraw-Hill, 2000
Multimedia
Stephen N. Elliot [and others]
McGraw-Hill, 2000
Buku Teks