Schwartz, D. J. (1987). The magic of thinking big. Simon & Schuster.
Lua i Stíl Chicago (17ú heag.)Schwartz, David Joseph. The Magic of Thinking Big. New York: Simon & Schuster, 1987.
Lua MLA (8ú heag.)Schwartz, David Joseph. The Magic of Thinking Big. Simon & Schuster, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.