Peale, N. V. (2003). The power of positive thinking (1st Fireside ed.). Fireside/Simon & Schuster.
Lua i Stíl Chicago (17ú heag.)Peale, Norman Vincent. The Power of Positive Thinking. 1st Fireside ed. New York: Fireside/Simon & Schuster, 2003.
Lua MLA (8ú heag.)Peale, Norman Vincent. The Power of Positive Thinking. 1st Fireside ed. Fireside/Simon & Schuster, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.