Lyon, Bryce, author
Harper and Brothers, 1960
Buku Teks
Durant, Ariel, author
Simon & Schuster, 1967
Buku Teks
Anderson, Bonnie S.
Harper Perennial, 1988
Buku Teks
Service, Robert, author
Cambridge : Massachusetts Harvard University Press, 2003
Buku Teks
Tanner, Tony, author
Longman Group, 1979
Buku Teks