Piper, T. (2001). And then there were two: Children and second language learning. Pippin Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPiper, Terry. And Then There Were Two: Children and Second Language Learning. Toronto: Pippin Pub., 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPiper, Terry. And Then There Were Two: Children and Second Language Learning. Pippin Pub., 2001.
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