APA (7th ed.) Zitazioa
Peale, N. V. (2004). The Power of Positive Thinking. Vermilion.
Chicago Style (17th ed.) Zitazioa
Peale, Norman Vincent. The Power of Positive Thinking. London: Vermilion, 2004.
MLA (9th ed.) Zitazioa
Peale, Norman Vincent. The Power of Positive Thinking. Vermilion, 2004.
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