(1949). Pursuit of happiness: A primer for modern living. Spero Foundation.
Lua i Stíl Chicago (17ú heag.)Pursuit of Happiness: A Primer for Modern Living. New York: Spero Foundation, 1949.
Lua MLA (8ú heag.)Pursuit of Happiness: A Primer for Modern Living. Spero Foundation, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.