APA (7th ed.) Citation

Roucek, J. S. (1968). The study of foreign languages. Philosophical Library.

Chicago Style (17th ed.) Citation

Roucek, Joseph S. The Study of Foreign Languages. New York: Philosophical Library, 1968.

MLA (8th ed.) Citation

Roucek, Joseph S. The Study of Foreign Languages. Philosophical Library, 1968.

Warning: These citations may not always be 100% accurate.