Voltaire, 1694-1778, author
Cambridge University Press , 1994
Buku Teks
Caldarone, Michael A.
Taylor & Francis Group, 2009
Buku Referensi
Ruse, Michael, author
Cummings Publishing Company, 1982
Buku Teks
Blanchard, Wendell
Buku Teks
Clinton, Michael
Sydney Prentice Hall 1996 ,
Buku Teks