Macintryre, Ewan, author
Blackstone Press, 1998
Buku Referensi
Corman, Calvin W., author
Little, Brown, 1983
Buku Teks
Countryman, Vern, author
Little, Brown, 1971
Buku Teks
Goode, Roy, author
Penguin Books, 2004
Buku Teks
Adams, Kristen David, author
St. Paul, MN : West Group, 2010
Buku Teks