Basseches,Nikolaus
Elsevier, 1960
Buku Teks
Djilas, Milovan, 1911-1995
Harcourt, Brace & World, 1962
Buku Teks
edited by David J. Galloway
Clarendon Press, 1991
Buku Teks
Fischer, George
Harvard University Press, 1952
Buku Teks
Ulam, Adam Bruno
Beacon Press, 1973
Buku Teks