Craigie, G., & Fu, K. (2022). Why humans build up: The rise of towers, temples and skyscrapers. Orca Book Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCraigie, Gregor, और Kathleen Fu. Why Humans Build Up: The Rise of Towers, Temples and Skyscrapers. [Victoria, British Columbia]: Orca Book Publishers, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCraigie, Gregor, और Kathleen Fu. Why Humans Build Up: The Rise of Towers, Temples and Skyscrapers. Orca Book Publishers, 2022.
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