APA (7th ed.) Citation

Hampsch, G. H. (1965). The theory of communism, an introduction. Philosophical Library.

Chicago Style (17th ed.) Citation

Hampsch, George H. The Theory of Communism, an Introduction. New York: Philosophical Library, 1965.

MLA (9th ed.) Citation

Hampsch, George H. The Theory of Communism, an Introduction. Philosophical Library, 1965.