APA (7th ed.) Citation

Cornelius, E. T. (1955). How to learn a foreign language (1a. ed.). Thomas Y. Crowell Co.

Chicago Style (17th ed.) Citation

Cornelius, Edwin T. How to Learn a Foreign Language. 1a. ed. Nueva York: Thomas Y. Crowell Co, 1955.

MLA (9th ed.) Citation

Cornelius, Edwin T. How to Learn a Foreign Language. 1a. ed. Thomas Y. Crowell Co, 1955.