Stepanova, Yelena Mikhaylovna, author
Foreign languages Publishing House , 1958
Buku Teks
Lenin, Vladimir I., author
Progress Publishers, 1965
Buku Teks
edited by Ronald L. Meek and Steve Weissman
Ramparts Press , 1971
Buku Teks
Dentici, Beniamino, autor
G. B. Van Goor Zonen, 1946
Buku Referensi
Kreemer, J., author
E. J. Brill, 1931
Buku Referensi