Citação APA (7ª ed.)
Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
Citação do estilo Chicago (17ª ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
Citação MLA (9ª ed.)
Piper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.