Cohen, David, author
Thomson Brooks/Cole, 2005
Buku Teks
Neimark, Edith D., author
Harcourt Brace Javanovich, 1987
Buku Teks
Rips, Lance J.
The Mlt Press, 1994
Buku Teks
Rudwick, Bernard H., author
John Wiley & Sons, 1979
Buku Teks
Keedy, Mervin L., author
Addison-Wesley, 1986
Buku Teks