Buku Teks
edited by Raven I. Mcdavid and Audrey R. Duckert
Foresman and Company,
Buku Teks
Blundell, Jon, author
Oxford University Press, 1982
Buku Teks
Hicks, Wynford, author
Routledge, 1995
Buku Teks
Gerber, Philip L., author
Random House, 1959
Buku Teks