Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks
edited by A. James
John Wiley & Sons, 1984
Buku Teks
edited by A. James
John Wiley & Sons, 1993
Buku Teks
Boyd, Claude E.
Springer International Publishing, 2015
eBooks
Shipman, James T.
D.C. Heath, 1990
Buku Teks