Cita APA (7a ed.)

Mangold, W. (1956). New active English (5a ed. rev.). Mangold.

Cita Chicago Style (17a ed.)

Mangold, Walter. New Active English. 5a ed. rev. Madrid: Mangold, 1956.

Cita MLA (9a ed.)

Mangold, Walter. New Active English. 5a ed. rev. Mangold, 1956.