White, Mark D., 1971-, author
Wiley Balckwell, 2014
Buku Teks
edited by Brigadier Peter Young
Hamlyn, 1981
Buku Referensi
Young, Peter, author
Bison Books, 1985
Buku Referensi
Heimann, Eduard
Charles Scribner`s Sons, 1947
Buku Teks
Gallagher, Matthew P., author
Frederick A. Preager, 1963
Buku Teks