APA (7th ed.) Citation

(1968). Fifty years of world revolution (1917-1967.). Merit Publishers.

Chicago Style (17th ed.) Citation

Fifty Years of World Revolution (1917-1967.). Merit Publishers, 1968.

MLA (8th ed.) Citation

Fifty Years of World Revolution (1917-1967.). Merit Publishers, 1968.

Warning: These citations may not always be 100% accurate.