Heying, H. (2021). A hunter-gatherer's guide to the 21st century: Evolution and the challenges of modern life (Unabridged.). Penguin Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeying, Heather. A Hunter-gatherer's Guide to the 21st Century: Evolution and the Challenges of Modern Life. Unabridged. New York: Penguin Audio, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeying, Heather. A Hunter-gatherer's Guide to the 21st Century: Evolution and the Challenges of Modern Life. Unabridged. Penguin Audio, 2021.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.