Curran, Stuart, author
Oxford University Press, 1986
Buku Teks
Bourke, Richard, author
St. Martin's Press, 1993
Buku Teks
edited by George R. Creeger and Joseph W. Reed, Jr.
Holt, Rinehart and Winston, 1964
Buku Teks
Franta, Andrew, author
Cambridge University Press, 2009
eBooks
Houghton, Walter E.
Houghton Mifflin, 1959
Buku Teks