Cita APA (7a ed.)
Vincent Peale, N. The Power of Positive Thinking. Prentice-Hall.
Cita estilo Chicago (17a ed.)
Vincent Peale, Norman. The Power of Positive Thinking. Nueva York, EUA: Prentice-Hall.
Cita MLA (9a ed.)
Vincent Peale, Norman. The Power of Positive Thinking. Prentice-Hall.
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