Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
Lua i Stíl Chicago (17ú heag.)Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
Lua MLA (9ú heag.)Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.