Rashiduzzaman, M.
Ideal Library, 1967
Buku Teks
O`Connor, Robert E.
Brooks/Cole, 1982
Buku Teks
Deutsch, Karl Wolfgang, 1912-1992
Houghton Mifflin, 1970
Buku Teks
Maki, John M.
Frederick A. Praeger, 1962
Buku Teks
Roelofs, H. Mark
The Dorsey press, 1968
Buku Teks