Canavan, Francis
Duke University Press, 1983
Buku Teks
Ma, Ho-tien
John Wiley Hopkins, 1949
Buku Teks
Irving, Washington
Dell Publishing Co., Inc., 1965
Buku Teks
American Council of Learned Societies, 1956
Buku Teks
Charles, W. Eliot, edited
P. F. Collier & Son Corporation, 1959 ; 1969
Buku Referensi