APA (7th ed.) Citation

Thom, E. M. (1950). Bibliography of North American geology 1948. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Thom, Emma Mertins. Bibliography of North American Geology 1948. Washington, [D.C.]: U.S. G.P.O., 1950.

MLA (8th ed.) Citation

Thom, Emma Mertins. Bibliography of North American Geology 1948. U.S. G.P.O., 1950.