Puchta, H., & Schratz, M. (1997). Teaching teenagers: Model activity sequences for humanistic language learning. Longman.
Citazione stile Chigago Style (17a edizione)Puchta, Herbert, e Michael Schratz. Teaching Teenagers: Model Activity Sequences for Humanistic Language Learning. Essex: Longman, 1997.
Citatione MLA (9a ed.)Puchta, Herbert, e Michael Schratz. Teaching Teenagers: Model Activity Sequences for Humanistic Language Learning. Longman, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.