Cita APA (7th ed.)

Allen, E. (1955). How to write & speak effective english. Fawcett.

Cita Chicago (17th ed.)

Allen, Edwards. How to Write & Speak Effective English. New York: Fawcett, 1955.

Cita MLA (9th ed.)

Allen, Edwards. How to Write & Speak Effective English. Fawcett, 1955.