Byrne, R. (2006). The Secret. Simon & Schuster Paper Book.
Cita Chicago (17th ed.)Byrne, Rhonda. The Secret. Simon & Schuster Paper Book, 2006.
Cita MLA (9th ed.)Byrne, Rhonda. The Secret. Simon & Schuster Paper Book, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.