APA (7th ed.) Citation

Pei, M. (1973). How to learn languages and what languages to learn (Enl. ed.). Harper & Row.

Chicago Style (17th ed.) Citation

Pei, Mario. How to Learn Languages and What Languages to Learn. Enl. ed. New York: Harper & Row, 1973.

MLA (9th ed.) Citation

Pei, Mario. How to Learn Languages and What Languages to Learn. Enl. ed. Harper & Row, 1973.