Perrins, C., Cameron, A., & Hutchinson, P. (1984). Bird life: An introduction to the world of birds. Peerage.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerrins, Christopher, Ad Cameron, और Peter Hutchinson. Bird Life: An Introduction to the World of Birds. London: Peerage, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPerrins, Christopher, et al. Bird Life: An Introduction to the World of Birds. Peerage, 1984.
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