Cita APA (7a ed.)

Schilpp, P. A. (1971). The philosophy of George Santayana (2nd ed., 2nd printing.). Open Court.

Cita Chicago Style (17a ed.)

Schilpp, Paul Arthur. The Philosophy of George Santayana. 2nd ed., 2nd printing. La Salle, Illinois: Open Court, 1971.

Cita MLA (9a ed.)

Schilpp, Paul Arthur. The Philosophy of George Santayana. 2nd ed., 2nd printing. Open Court, 1971.