Moyar, Mark, author
Cambridge University Press, 2006
Buku Teks
Souter, Gerry, author
Andre Deutsch, 2015
Buku Referensi
editor in chief, Stanley I. Kutler
Charles Scribner's Sons, 1996
Buku Referensi
Chat, Le Van, author
Foreign Languagea Publishing House, 1962
Buku Teks
Fall, Bernard B
Frederick A.Preager, 1966
Buku Teks