Knoebl, Kuno
Frederick A. Praeger , 1967
Buku Teks
Just, Ward S
Houghton Miffiln, 1968
Buku Teks
Chat, Le Van, author
Foreign Languagea Publishing House, 1962
Buku Teks
Rintoul, Stuart
William Heinemann Australia, 1987
Buku Teks
Jajasan Kebudajaan Sabar, 1965
Buku Teks