Brusewitz, R. V. i. b. G. In search of artic birds. T and AD Poyser.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrusewitz, Richard Vaughan illustrated by Gunnar. In Search of Artic Birds. T and AD Poyser.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBrusewitz, Richard Vaughan illustrated by Gunnar. In Search of Artic Birds. T and AD Poyser.
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