APA (7th ed.) Citation

Geological Survey (U.S.) & Hopkins, D. M. (1955). Permafrost and ground water in Alaska. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and David Moody Hopkins. Permafrost and Ground Water in Alaska. Washington: U.S. Govt. Print. Off, 1955.

MLA (9th ed.) Citation

Geological Survey (U.S.) and David Moody Hopkins. Permafrost and Ground Water in Alaska. U.S. Govt. Print. Off, 1955.