Ruiz, . D. M. (2000). The four agreements: Practical guide to personal freedom. Amber-Allen Pub. : Distributed by Publishers Group West.
Citazione stile Chigago Style (17a edizione)Ruiz, Don Miguel. The Four Agreements: Practical Guide to Personal Freedom. San Rafael, Calif.: Amber-Allen Pub. : Distributed by Publishers Group West, 2000.
Citatione MLA (9a ed.)Ruiz, Don Miguel. The Four Agreements: Practical Guide to Personal Freedom. Amber-Allen Pub. : Distributed by Publishers Group West, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.