Goldschmidt, Arthur
Westview Press, 1983
Buku Teks SO
Lockman, Zachary
Cambridge, 2004
Buku Teks SO
edited and with introductions by Charles Issawi
The University of Chicago Press, 1966
Buku Teks SO
Fisher, Sydney Nettleton
Routledge & Kegan Paul, 1959
Buku Teks SO
edited by Reeva S. Simon, Philip Mattar and Richard W. Bulliet
Macmillan, 1996
Buku Referensi