Παραπομπή σε μορφή APA (7η εκδ.)

Peale, N. V. (1976). The positive principle today: How o renew and sustain the power of positive thinking. A Fawcett Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Peale, Norman Vincent. The Positive Principle Today: How O Renew and Sustain the Power of Positive Thinking. New York: A Fawcett Publications, 1976.

Παραπομπή σε μορφή MLA (8th εκδ.)

Peale, Norman Vincent. The Positive Principle Today: How O Renew and Sustain the Power of Positive Thinking. A Fawcett Publications, 1976.