edited by Catherine Itzin
Oxford University Press, 1992
Buku Teks
Scott, F.R. (Francis Reginald)
Published in co-operation with Carleton University by University of Toronto Press, 1959
Buku Teks
Howells, Kerry
Sense, 2012
eBooks
Stone, Richard
Blackstone Press limited, 1997
Buku Teks
Barker, Lucius J.
Prentice-Hall, 1978
Buku Teks