Noor, Abdun, author
World Bank, 1981
Buku Teks
Gandhi, M.K.
Ahmedabad Navajivan Publishing House 1951
Buku Teks
edited by Helen Yura
Appleton-century-crofts, 1978
Buku Teks
Ellis, Janice Rider, author
Hoghton Mifflin, 1977
Buku Teks
Ellis, Janice Rider, author
Houghton Miffinn, 1981
Buku Teks