Cita APA (7a ed.)

Santayana, G., & Lachs, J. (1996). Physical Order and Moral Liberty: Previously Unpublished Essays of George Santayana. Vanderbilt University Press.

Cita Chicago Style (17a ed.)

Santayana, George, y John Lachs. Physical Order and Moral Liberty: Previously Unpublished Essays of George Santayana. Nashville: Vanderbilt University Press, 1996.

Cita MLA (8a ed.)

Santayana, George, y John Lachs. Physical Order and Moral Liberty: Previously Unpublished Essays of George Santayana. Vanderbilt University Press, 1996.