edited by Robert O. Freedman
Westview Press, 1984
Buku Teks
Jureidini, Paul A., author
Syracuse University Press, 1981
Buku Teks
Milton-Edwards, Beverly, author
Routledge, 2003
Buku Teks
Ovendale, Ritchie
Longman, 1993
Buku Teks
Walz, Jay, author
Atheneum, 1966
Buku Teks