Dyfyniad APA

Ruiz Don Miguel. (1997). Four Agreements. Amber -Allen Publishing.

Dyfyniad Arddull Chicago

Ruiz Don Miguel. Four Agreements. Amber -Allen Publishing, 1997.

Dyfyniad MLA

Ruiz Don Miguel. Four Agreements. Amber -Allen Publishing, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.