Benton, William, author
Associated College Press, 1958
Buku Teks
Kemper, Michael, edited, Motika, Raoul, edited, Reichmuth, Stefan, edited
Routledge, 2010
Buku Teks
edited, S.G. Shapovalenko
Unesco, 1963
Buku Teks
Gup, Benton E., author
Bankers Publication , 1990
Buku Teks
Krupskaya, N.K.
Foreign Languages Publishing House, 1957
Buku Teks