APA (7th ed.) Citation

Santayana, G. (1905). The life of reason or the phases of human progress / by G. Santayana. Scribner's.

Chicago Style (17th ed.) Citation

Santayana, G. The Life of Reason or the Phases of Human Progress / by G. Santayana. Scribner's, 1905.

MLA (9th ed.) Citation

Santayana, G. The Life of Reason or the Phases of Human Progress / by G. Santayana. Scribner's, 1905.

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