Creel, George, 1876-1953, author
Bobbs-Merrill, 1949
Buku Teks
Lobanov-Rostovsky, Prince A.
Macmillan, 1933
Buku Teks
Dallin, David J.
Yale University Press, 1949
Buku Teks
Lewis, David C., author
Curzon, 2000
Buku Teks
Salisbury, Harrison E., author
Atheneum, 1965
Buku Teks