Kaplan, David, author
Pustaka Pelajar, 1999
Buku Teks
Inglis, David, author
Routledge, 2005
Buku Teks
Ambrose, James E., author
John Wiley & Sons, 1980
Buku Teks
by Mike Savage ...[and others]
Routledge, 1992
Buku Teks
Ambrose, James E., author
John Wiley & Sons, 1995
Buku Teks