George-Braziller , 1963
Buku Teks
Coates, Benjamin Allen
Oxford University Press, 2016
eBooks
Fugate, Wilbur L.
Little, Brown, 1982
Buku Teks
edited by Richard P. Stebbins
Published for the Council on Foreign Relations by Simon and Schuster, [1939-1970], 1963
Buku Teks
edited by Richard P. Stebbins
American Book-stratford Press, 1963
Buku Teks