Engel, B. (2001). The power of apology: Healing steps to transform all your relationships. New York: J. Wiley.
Παραπομπή Chicago StyleEngel, Beverly. The Power of Apology: Healing Steps to Transform All Your Relationships. New York: J. Wiley, 2001.
Παραπομπή MLAEngel, Beverly. The Power of Apology: Healing Steps to Transform All Your Relationships. New York: J. Wiley, 2001.
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