APA (7th ed.) Citation

Santayana, G., & Henfrey, N. (1968). Selected Critical Writings. University Press.

Chicago Style (17th ed.) Citation

Santayana, George, and Norman Henfrey. Selected Critical Writings. Cambridge: University Press, 1968.

MLA (9th ed.) Citation

Santayana, George, and Norman Henfrey. Selected Critical Writings. University Press, 1968.