Collier, Leonard Dawson
Everyday Spanish
St. Paul's House Warwick Lane, 1973
 Buku Teks SO
Maslov, Yevgeny
Russian federation
Moscow Foreign Languages Publishing House 1960
 Buku Teks
Potapova, Nina F.
Learning Russian
Progress Publishers, [196-]
 Buku Teks SO
Moorehead, Alan, 1910-1983
The Russian revolution
Harper and Brother, 1958
 Buku Teks SO
The Russian Intelligentsia
by Martin Malia ... [and others]; editor, Richard Pipes
Columbia University , 1961
 Buku Teks SO