Andreatta, Susan, author
Wadsworth, Cengage Learning, 2013
Buku Teks
Ferraro, Gary P., author
Cengage Learning, 2018
Buku Teks
Ferraro, Gary P., author
Delmar Cengage Learning, 2014
Buku Teks
Westview Press, 1986
Buku Teks
Frost, Frank J.
D.C Heath, 1980
Buku Teks