Hubbard, Leonard E., author
MacMillan, 1939
Buku Teks
Campbell, Robert W., author
Harvard University Press, 1963
Buku Teks
selected, edited and introduced by Rudolf Schlesinger ; translated by W.W. Gottlieb
Routledge & Kegan Paul , 1956
Buku Teks
Luknitsky, Pavel
Foreign Languages Publishing House, 1954
Buku Teks
Lenin, Vladimir I., author
Foreign Languanges Publishing House, [1967]
Buku Teks