Cita APA (7th ed.)

Santayana, G. (1935). The philosophie of Santayana. Random House.

Cita Chicago (17th ed.)

Santayana, George. The Philosophie of Santayana. New York: Random House, 1935.

Cita MLA (8th ed.)

Santayana, George. The Philosophie of Santayana. Random House, 1935.