Cita APA (7th ed.)
Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
Cita Chicago (17th ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
Cita MLA (9th ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
Atenció: Aquestes cites poden no estar 100% correctes.