Müller-Schwarze, D. (2011). The beaver: Its life and impact (2nd ed.). Comstock Pub. Associates.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMüller-Schwarze, Dietland. The Beaver: Its Life and Impact. 2nd ed. Ithaca: Comstock Pub. Associates, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMüller-Schwarze, Dietland. The Beaver: Its Life and Impact. 2nd ed. Comstock Pub. Associates, 2011.
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