APA (7th ed.) Citation

Santayana, G. (2008). The realm of essence: Book first of Realms of being. Kessinger Publishing.

Chicago Style (17th ed.) Citation

Santayana, George. The Realm of Essence: Book First of Realms of Being. [Whitefish, Mont.]: Kessinger Publishing, 2008.

MLA (9th ed.) Citation

Santayana, George. The Realm of Essence: Book First of Realms of Being. Kessinger Publishing, 2008.