Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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