APA (7th ed.) Citation

Mason, R. S., & Erwin, M. I. (1955). Coal resources of Oregon. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Mason, Ralph S., and Margaret Isabelle Erwin. Coal Resources of Oregon. Washington, D.C.: United States Department of the Interior, Geological Survey, 1955.

MLA (9th ed.) Citation

Mason, Ralph S., and Margaret Isabelle Erwin. Coal Resources of Oregon. United States Department of the Interior, Geological Survey, 1955.