Muller, S. W., French, H. M., & Nelson, F. E. (2008). Frozen in time: Permafrost and engineering problems. American Society of Civil Engineers. https://doi.org/10.1061/9780784409893
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMuller, Siemon W., Hugh M. French, और Frederick E. Nelson. Frozen in Time: Permafrost and Engineering Problems. Reston, Virginia: American Society of Civil Engineers, 2008. https://doi.org/10.1061/9780784409893.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMuller, Siemon W., et al. Frozen in Time: Permafrost and Engineering Problems. American Society of Civil Engineers, 2008. https://doi.org/10.1061/9780784409893.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.