Ruiz Don Miguel. (1997). Four Agreements. Amber -Allen Publishing.
Cita Chicago (17th ed.)Ruiz Don Miguel. Four Agreements. Amber -Allen Publishing, 1997.
Cita MLA (9th ed.)Ruiz Don Miguel. Four Agreements. Amber -Allen Publishing, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.