Cambridge University Press, 2015
Buku Teks
Duffy, Helen, author
Cambridge University Press, 2015
Buku Teks
Strategicus
Faber and Faber, 1987
Buku Teks
edited by Brigadier Peter Young
Hamlyn, 1981
Buku Referensi
Falls, Cyril, 1888-1971, author
G.P. Putnam's Sons, 1959
Buku Teks