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
Cummings, Paul, author
St. Martin's Press, 1966
Buku Referensi
Evans, Bergen, 1904-, author
Random House, 1957
Buku Referensi
edited by Howard Nemerov
Voice of America Forum Lectures, 1973
Buku Teks