McCall, Timothy, author
Bantam Books, 2007
Buku Teks
Milburn, Michael P., author
The Crossing Press, 2001
Buku Teks
edited by, Wayne B. Jonas, Cindy C. Crawford
Churchill Livingstone, 2003
Buku Teks
Kimball, Linda Amy
University Microfilms International, 1979
Buku Teks
Goldstein, Mark A, author
Rodale, 2008
Buku Teks