Nunan, D. (1999). Second language teaching & learning. Heinle Cengage Learning.
Citazione stile Chigago Style (17a edizione)Nunan, David. Second Language Teaching & Learning. Boston, Mass: Heinle Cengage Learning, 1999.
Citatione MLA (9a ed.)Nunan, David. Second Language Teaching & Learning. Heinle Cengage Learning, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.