Berenstain, S. (2011). The berenstain bears and the trouble with friends.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerenstain, Stan. The Berenstain Bears and the Trouble with Friends. 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBerenstain, Stan. The Berenstain Bears and the Trouble with Friends. 2011.
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