Παραπομπή APA

Peale, N. V. (1975). power of positive thinking: A practical guide to mastering the problems of everyday living. Universal Publications.

Παραπομπή Chicago Style

Peale, Norman Vicent. Power of Positive Thinking: A Practical Guide to Mastering the Problems of Everyday Living. Delhi: Universal Publications, 1975.

Παραπομπή MLA

Peale, Norman Vicent. Power of Positive Thinking: A Practical Guide to Mastering the Problems of Everyday Living. Universal Publications, 1975.