Buell, Lawrence, author
Blackwell Publishing, 2005
Buku Teks
Habib, M.A.R., author
Blackwell, 2008
Buku Teks
Davis, Con, author
Longman, 1991
Buku Teks
Juhl, P.D.
Princeton University Press, 1980
Buku Teks
Compiled and edited by Dorothy Nyren Curley, Maurice Kramer, Elaine Fialka Kramer
Continuum, 1989
Buku Referensi