Citazione Stile APA (7a Edizione)

Nunan, D. (1999). Second language teaching and learning. Heinle and Heinle Publishers.

Citazione stile Chigago Style (17a edizione)

Nunan, David. Second Language Teaching and Learning. Boston: Heinle and Heinle Publishers, 1999.

Citatione MLA (9a ed.)

Nunan, David. Second Language Teaching and Learning. Heinle and Heinle Publishers, 1999.