Gaya APA
Hudson, G.
(1968).
Fifty years of Communism, theory and practice 1917-1967.
.
Harmondsworth:
Penguin Books.
Gaya MLA
Hudson, G.F..
"Fifty years of Communism, theory and practice 1917-1967. ".
Harmondsworth:
Penguin Books,
1968.
Buku.