Countryman, Vern
Little, Brown, 1971
Buku Teks
Corman, Calvin W.
Little, Brown, 1983
Buku Teks
Corman, Calvin W.
Little,Brown and Company, 1983
Buku Teks
Heaton, Russell
Blackstone, 1998
Buku Referensi
Weatherill, Stephen
Blackstone Press Ltd., 1998
Buku Teks