Ladd, Everett Carll.
W.W. Norton , 1972
Buku Teks
Vogel, Ezra F.
Univertity of California Press, 1967
Buku Teks
edited by Kenneth G. Elzinga
Harper & Row, 1972
Buku Teks
Voltaire, 1694-1778
New York Dell 1959
Buku Teks
Richard T. LeGates, Frederic Stout, editor
Routledge, 2000
Buku Teks