APA (7th ed.) Citation

Clarke, O. M. (1969). Mineral resources map of Marengo County, Alabama. Geological Survey of Alabama.

Chicago Style (17th ed.) Citation

Clarke, Otis M. Mineral Resources Map of Marengo County, Alabama. [University, Ala.]: Geological Survey of Alabama, 1969.

MLA (9th ed.) Citation

Clarke, Otis M. Mineral Resources Map of Marengo County, Alabama. Geological Survey of Alabama, 1969.