APA (7th ed.) Citation

Hadley, A. O. (1993). Research in language learning: Principles, processes, and prospects. National Textbook Company.

Chicago Style (17th ed.) Citation

Hadley, Alice Omaggio. Research in Language Learning: Principles, Processes, and Prospects. Lincolnwood: National Textbook Company, 1993.

MLA (9th ed.) Citation

Hadley, Alice Omaggio. Research in Language Learning: Principles, Processes, and Prospects. National Textbook Company, 1993.