Cita APA (7th ed.)
Peale, N. V. (2004). The Power of Positive Thinking. Vermilion.
Cita Chicago (17th ed.)
Peale, Norman Vincent. The Power of Positive Thinking. London: Vermilion, 2004.
Cita MLA (9th ed.)
Peale, Norman Vincent. The Power of Positive Thinking. Vermilion, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.