Roberts, D., & Elfer, J. (2022). Into the great emptiness: Peril and survival on the greenland ice cap (Unabridged.). Blackstone Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoberts, David, और Julian Elfer. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. Unabridged. Ashland: Blackstone Publishing, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoberts, David, और Julian Elfer. Into the Great Emptiness: Peril and Survival on the Greenland Ice Cap. Unabridged. Blackstone Publishing, 2022.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.