Partridge, Eric, 1894-1979, author
Routledge, 1991
Buku Referensi
Weis, Erich, author
National Textbook Company, 1993
Buku Referensi
Elias, Elias A., author
Elias Modern Press, 1972
Buku Referensi
Weekley, Ernest, author
Dover Publications, 1967
Buku Referensi
Lin, Yutang, author
The Chinese University Press, 1982
Buku Referensi