Goode, Walter
Cambridge University Press, 2007
Buku Referensi
Cuddon, J.A.
Penguin Books, 1979
Buku Referensi
Greenstein, Carol Horn
Van Nostrand Reinhold, 1978
Buku Referensi
Henderson, I. F.
Harlow, England Longman Scientific and Technical
Buku Referensi
Deutsch, Babette
Funk & Wagnalls, 1957
Buku Referensi