APA (7th ed.) Citation

Santayana. The Life of Reason or The Phases of Human Progress. The MIT Press.

Chicago Style (17th ed.) Citation

Santayana. The Life of Reason or The Phases of Human Progress. The MIT Press.

MLA (8th ed.) Citation

Santayana. The Life of Reason or The Phases of Human Progress. The MIT Press.

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