Lavell, C.F., author
Macmillan, 1919
Buku Teks
R. Po-Chia Hsia
BlackWell Publishing, 2006
Buku Teks
Munchen : Deutscher Taschenbuch Verlag GmbH, 1973
Buku Teks
Huizinga, Johan, author
Harper & Row, 1957
Buku Teks
Holborn, Hajo, 1902-1969, author
Alfred A. Knopf, 1967
Buku Teks