APA (7th ed.) Zitazioa
Schuller, R. H. (1983). Peace of mind through possibility thinking. Doubleday & Co., Inc..
Chicago Style (17th ed.) Zitazioa
Schuller, Robert H. Peace of Mind Through Possibility Thinking. New York: Doubleday & Co., Inc., 1983.
MLA (9th ed.) Zitazioa
Schuller, Robert H. Peace of Mind Through Possibility Thinking. Doubleday & Co., Inc., 1983.
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