Fage, J.D., author
Routledge, 1995
Buku Teks
Hatch, John, author
Frederick A. Praeger, 1965
Buku Teks
Oliver, Roland
Penguin Books , 1966
Buku Teks
Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks
Godee-Molsbergen, E.C.
Longman, Green, 1910
Buku Teks