Cita APA (7th ed.)

Peale, N. V. (1967). Enthusiasm Makes the Difference. Fatcett.

Cita Chicago (17th ed.)

Peale, Norman Vincent. Enthusiasm Makes the Difference. Greenwich, Conn: Fatcett, 1967.

Cita MLA (9th ed.)

Peale, Norman Vincent. Enthusiasm Makes the Difference. Fatcett, 1967.