Hume, David, author
Oxford University Press, 2000
Buku Teks
Belli, Pierin
Oceana Publications Inc, 1964
Buku Teks
Oppenheim, L., author
Longmas, Green, 1952
Buku Teks
compiled and edited by M.Cherif Bassiouni and Ved P. Nanda
Charles C. Thomas, 1973
Buku Teks
Locke, John, author
The Bobbs-Merrill Company, Inc, 1952
Buku Teks