Dulles, Allen
Harper & Row Publishers, 1966
Buku Teks
Ind, Allison, author
David McKay, 1958
Buku Teks
Ambrose, Stephen E., author
Simon & Schuster, 2004
Buku Teks
Woon, Walter C. M., author
Marshall Cavendish Editions, 2010
Buku Teks
Kecskemeti, Paul, author
Stanford University Press, 1958
Buku Teks