Cita APA (7a ed.)
Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
Cita Chicago Style (17a ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
Cita MLA (9a ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
Precaución: Estas citas no son 100% exactas.