Gendt, M.C.E. van
Krips Repro, 1980
Buku Teks
Gandhi, M.K.
Ahmedabad Navajivan Publishing House 1951
Buku Teks
Laetsch, Watson M., author
Little, Brown, 1979
Buku Teks
Bartz, Albert E
Macmillan, 1981
Buku Teks
Holloway, Immy, author
Blackwell, 1997
Buku Teks