Cronin, James E., author
Routledge, 1991
Buku Teks
Fawcett Publications, Inc., 1966
Buku Teks
Swindells, Julia, author
Polity Press, 1985
Buku Teks
edited by David Loewenstein, James Grantham Turner
Cambridge University Press, 1990
Buku Teks
Jones, Bill, author
Manchester University Press, 1993
Buku Teks