Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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