Macmillan, W.M., author
Faber and Faber, 1959
Buku Teks
Anderson, Collin, author
Vic. : Images, 2012
Buku Referensi
Cady, John F.
American Institute of Pacific Relations, 1948
Buku Teks
Eckhardt, Robert B., author
McGraw-Hill, 1979
Buku Teks
Niculescu, Barbu
George Allen & Uniwin , 1958
Buku Teks