APA (7th ed.) Citation

(1950). Kingdom of this world. The challenge of communism. London etc..

Chicago Style (17th ed.) Citation

Kingdom of This World. The Challenge of Communism. London etc., 1950.

MLA (8th ed.) Citation

Kingdom of This World. The Challenge of Communism. London etc., 1950.

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