Higgins, Hugh, author
Heinemann Educational, 1975
Buku Teks
Monnerot, Jules, author
George Allen and Unwin, 1953
Buku Teks
edited by Richard M. Ketchum
Dutton , 1955
Buku Teks
Schatten, Fritz, author
Frederick A. Praeger, 1966
Buku Teks
Hoang. Van Chi
Allied Publishers, 1964
Buku Teks