APA (7th ed.) Zitazioa

Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..

Chicago Style (17th ed.) Zitazioa

Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.

MLA (9th ed.) Zitazioa

Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.