Gunn, Geoffrey C.
Boulder Westview Press 1990,
Buku Teks
State University of New York Press, 2001
Buku Teks
Shin, Doch C.
Cambridge Cambridge University Press 1999
Buku Teks
Yahuda, Michael, author
London Routledge 1996
Buku Teks
Jones, Bill, author
Manchester University Press, 1990
Buku Teks