Cita APA (7th ed.)
Peale, N. V. (1952). The power of positive thinking. Prentice-Hall.
Cita Chicago (17th ed.)
Peale, Norman Vincent. The Power of Positive Thinking. New York: Prentice-Hall, 1952.
Cita MLA (9th ed.)
Peale, Norman Vincent. The Power of Positive Thinking. Prentice-Hall, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.