New York Graphic Society, 1958
Buku Referensi
Yakhontoff, Victor A.
Coward-McCann, 1945
Buku Teks
Priss, A.
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Koblyakov, I. K.
Progress, 1976
Buku Teks
Francon, M., author
Row, Peterson, 1961
Buku Teks