R. Conquest
Macmillan & CO LTD, 1960
Buku Teks
Paeger Pub., 1975
Buku Teks
selected, edited and introduced by Rudolf Schlesinger ; translated by W.W. Gottlieb
Routledge & Kegan Paul , 1956
Buku Teks
Kolarz, Walter
Frederick A.Praeger, 1955
Buku Teks
Hodgman, Donald R.
Harvard University Press, 1954
Buku Teks