APA (7th ed.) Citation

Ash, S. H. (1950). Inundated anthracite reserves: Eastern middle field of Pennsylvania. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Ash, S. H. Inundated Anthracite Reserves: Eastern Middle Field of Pennsylvania. Washington, D.C.: U.S. G.P.O., 1950.

MLA (8th ed.) Citation

Ash, S. H. Inundated Anthracite Reserves: Eastern Middle Field of Pennsylvania. U.S. G.P.O., 1950.