Peale, N. V. (1975). power of positive thinking: A practical guide to mastering the problems of everyday living. Universal Publications.
Παραπομπή Chicago StylePeale, Norman Vicent. Power of Positive Thinking: A Practical Guide to Mastering the Problems of Everyday Living. Delhi: Universal Publications, 1975.
Παραπομπή MLAPeale, Norman Vicent. Power of Positive Thinking: A Practical Guide to Mastering the Problems of Everyday Living. Universal Publications, 1975.
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