APA (7th ed.) Citation

Santayana, G. (1927). Platonism and the spiritual life. C. Scribner's sons.

Chicago Style (17th ed.) Citation

Santayana, George. Platonism and the Spiritual Life. New York: C. Scribner's sons, 1927.

MLA (9th ed.) Citation

Santayana, George. Platonism and the Spiritual Life. C. Scribner's sons, 1927.