Krupskaya, N.K.
Foreign Languages Publishing House, 1957
Buku Teks
Mongait, Alexander
Foreign Languages Publishing House, 1959
Buku Teks
Kemper, Michael, edited, Motika, Raoul, edited, Reichmuth, Stefan, edited
Routledge, 2010
Buku Teks
Benton, William
Associated College Press, 1958
Buku Teks
Silvius, G. Harold.
McKnight & McKnight , 1961
Buku Teks