APA (7th ed.) Citation

Peale, N. V. (1976). The Positive principle today: How to renew and sustain the power of positive thinking. Prentice-Hall.

Chicago Style (17th ed.) Citation

Peale, Norman Vincent. The Positive Principle Today: How to Renew and Sustain the Power of Positive Thinking. Englewood Cliffs, N.J: Prentice-Hall, 1976.

MLA (9th ed.) Citation

Peale, Norman Vincent. The Positive Principle Today: How to Renew and Sustain the Power of Positive Thinking. Prentice-Hall, 1976.