Freeman, M. (1984). The wildlife and nature photographer's field guide. Writer's Digest Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFreeman, Michael. The Wildlife and Nature Photographer's Field Guide. Cincinnati: Writer's Digest Books, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFreeman, Michael. The Wildlife and Nature Photographer's Field Guide. Writer's Digest Books, 1984.
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