APA (7th ed.) Citation

Santayana, G. (1923). Scepticism and animal faith: Introduction to a system of philosophy. Scribner.

Chicago Style (17th ed.) Citation

Santayana, George. Scepticism and Animal Faith: Introduction to a System of Philosophy. New York: Scribner, 1923.

MLA (9th ed.) Citation

Santayana, George. Scepticism and Animal Faith: Introduction to a System of Philosophy. Scribner, 1923.

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