Cita APA (7th ed.)

Cornelius, E. (1955). How to learn a foreing language. Crowell Co.

Cita Chicago (17th ed.)

Cornelius, Edwin. How to Learn a Foreing Language. New York, Estados Unidos: Crowell Co, 1955.

Cita MLA (9th ed.)

Cornelius, Edwin. How to Learn a Foreing Language. Crowell Co, 1955.