Casey, Edward S., 1939-
Spring Publications, 1991
Buku Teks SO
Medina, John Fitzgerald
Bahai, 2006
Buku Teks SO
Montesquieu, Charles de Secondat,1689-1755
Hafner Press, 1949
Buku Teks SO
Beard, Charles A.
Macmillan, 1942
Buku Teks SO
Etzioni, Amitai
A Touchestone Book, 1994
Buku Teks SO