New York: M.E Sharpe
Majalah, Jurnal, Buletin
Pennsylvania : Pennsylvania State University Press
Majalah, Jurnal, Buletin
Alexandrova, Vera
New York Doubleday 1963
Buku Teks
Moskwa : Soviet Writer Publidhing House
Majalah, Jurnal, Buletin
Munich : Institute for the Study of the USSR
Majalah, Jurnal, Buletin