Citazione Stile APA (7a Edizione)

Birdsong, D. (1999). Second language acquisition and the critical period hypothesis. Lawrence Erlbaum Associates.

Citazione stile Chigago Style (17a edizione)

Birdsong, David. Second Language Acquisition and the Critical Period Hypothesis. Mahwah: Lawrence Erlbaum Associates, 1999.

Citatione MLA (9a ed.)

Birdsong, David. Second Language Acquisition and the Critical Period Hypothesis. Lawrence Erlbaum Associates, 1999.