Cita APA (7th ed.)
Peale, N. V. (1954). Die Kraft positiven Denkens: (The Power of positive thinking [Deutsch]). Oesch.
Cita Chicago (17th ed.)
Peale, Norman Vincent. Die Kraft Positiven Denkens: (The Power of Positive Thinking [Deutsch]). Thalwil, Zürich: Oesch, 1954.
Cita MLA (9th ed.)
Peale, Norman Vincent. Die Kraft Positiven Denkens: (The Power of Positive Thinking [Deutsch]). Oesch, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.