APA (7th ed.) Citation

Santayana, G. (1962). The life of reason: Or, the phases of human progress. Collier Books.

Chicago Style (17th ed.) Citation

Santayana, George. The Life of Reason: Or, the Phases of Human Progress. New York: Collier Books, 1962.

MLA (9th ed.) Citation

Santayana, George. The Life of Reason: Or, the Phases of Human Progress. Collier Books, 1962.