edited by Davis S. Miall
Clarendon Press, 1990
Buku Teks
Jones, W.T. (William Thomas), 1910-, author
University of California, [Date of publication not identified]
Buku Teks
Hockey, Susan M., author
Oxford University Press, 1985
Buku Teks
edited by Judy Reynolds
Haworth Press, 1994
Buku Referensi
Dawson, Paul, author
Routledge, 2005
Buku Teks