APA (7th ed.) Citation

Pfenninger, S. E., & Singleton, D. M. (2017). Beyond age effects in instructional L2 learning: Revisiting the age factor. Multilingual Matters.

Chicago Style (17th ed.) Citation

Pfenninger, Simone E., and David M. Singleton. Beyond Age Effects in Instructional L2 Learning: Revisiting the Age Factor. Bristol ; Blue Ridge Summit: Multilingual Matters, 2017.

MLA (9th ed.) Citation

Pfenninger, Simone E., and David M. Singleton. Beyond Age Effects in Instructional L2 Learning: Revisiting the Age Factor. Multilingual Matters, 2017.