Jones, Walter S.
Harper Collins , 1991
Buku Teks
Goldmann, Kjell, author
Routledge, 1996
Buku Teks
Griffith, Martin, author
Routledge, 2002
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Routledge, 1997
Buku Teks