McKaughan, Howard P., author
Institute of National Language, 1958
Buku Teks
Wade, Terence
New York : Oxford University Press, 2002
Buku Referensi
Cowie, A.P., author
Oxford University Press, 1993
Buku Referensi
Horowitz, Anthony, 1955-, author
Walker Books, 2015
Buku Teks
Gandhi, M.K., 1869-1948, author
Navajivan, 1948
Buku Teks