Greene, Walter H., author
Waveland Press, 1984
Buku Teks
Mitchell, Joyce, author
Delmar/Thomson Learning, 2002
Buku Teks
Sorkin, Alan L., author
Massachusetts Lexington Books, 1984
Buku Teks
Wonderling, David, author
Open University Press, 2005
Buku Teks
Saltman, Deborah, author
Harcourt Brace Jovanovich, 1991
Buku Teks