Yates, Edward D., author
Contemporary Publishing Company, 1981
Buku Teks
Baglione, Lisa A., author
Thomson Wadsworth, 2007
Buku Teks
Le Roy, Michael K., author
Wadsworth, 2009
Buku Teks
Nagel, Stuart S., author
Sage , 1976
Buku Teks
Hatcher, Jeffrey, author
Story Press, 1996
Buku Teks