Montgomery, Martin, author
Routledge , 1993
Buku Teks
Littlewood, William, author
Cambridge University Press, 1994
Buku Teks
Hughes, John P., author
Random House, 1966
Buku Teks
Coleman, John R., author
Cambridge University Press, 2005
Buku Teks
Chatman, Seymour, author
Houghton Miffiln, 1968
Buku Teks