APA (7th ed.) Citation

Ashmead, D. C. (1927). Mining of thin coal beds in the anthracite region of Pennsylvania. U.S. Govt. print. off..

Chicago Style (17th ed.) Citation

Ashmead, Dever C. Mining of Thin Coal Beds in the Anthracite Region of Pennsylvania. Washington: U.S. Govt. print. off., 1927.

MLA (8th ed.) Citation

Ashmead, Dever C. Mining of Thin Coal Beds in the Anthracite Region of Pennsylvania. U.S. Govt. print. off., 1927.