Cita APA (7a ed.)
Peale, N. (1967). Enthusiasm makes the difference. Prentice-Hall.
Cita Chicago Style (17a ed.)
Peale, Norman. Enthusiasm Makes the Difference. New Jersey: Prentice-Hall, 1967.
Cita MLA (9a ed.)
Peale, Norman. Enthusiasm Makes the Difference. Prentice-Hall, 1967.
Precaución: Estas citas no son 100% exactas.