Caliandro, A., & Lenson, B. (2000). Simple steps: Ten things you can do to create an exceptional life. New York: McGraw-Hill.
Παραπομπή Chicago StyleCaliandro, Arthur., και Barry Lenson. Simple Steps: Ten Things You Can Do to Create an Exceptional Life. New York: McGraw-Hill, 2000.
Παραπομπή MLACaliandro, Arthur., και Barry Lenson. Simple Steps: Ten Things You Can Do to Create an Exceptional Life. New York: McGraw-Hill, 2000.
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