APA (7th ed.) Citation

Puchta, H., & Schratz, M. (1997). Teaching teenagers: Model activity sequences for humanistic language learning. Longman.

Chicago Style (17th ed.) Citation

Puchta, Herbert, and Michael Schratz. Teaching Teenagers: Model Activity Sequences for Humanistic Language Learning. Essex: Longman, 1997.

MLA (9th ed.) Citation

Puchta, Herbert, and Michael Schratz. Teaching Teenagers: Model Activity Sequences for Humanistic Language Learning. Longman, 1997.