Sullivan, Thomas J., 1944-, author
Macmillan, 1988
Buku Teks
Hicks, John R., author
Oxford University Press, 1975
Buku Teks
Leeuwen, Theo van, author
Routledge , 2005
Buku Teks
Coulshed, Veronica, author
Macmillan, 1988
Buku Teks
Jones, Emrys, author
Oxford University Press, 1977
Buku Teks