Macintryre, Ewan, author
Blackstone Press, 1998
Buku Referensi
Corman, Calvin W., author
Little, Brown, 1983
Buku Teks
Corman, Calvin W., author
Little,Brown and Company, 1983
Buku Teks
Le Sueur, A.P. (Andrew P.), author
Oxford University Press, 2013
Buku Teks
Coutryman, Vern
Lettle, Brown and Company, 1979
Buku Teks