APA-referens (7:e uppl.)
Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
Chicago-referens (17:e uppl.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
MLA-referens (9:e uppl.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.