APA (7th ed.) Citation

Mamay, S. H. (1954). Two new plant genera of Pennsylvanian age from Kansas coal balls. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Mamay, Sergius H. Two New Plant Genera of Pennsylvanian Age from Kansas Coal Balls. Washington: United States Department of the Interior, Geological Survey, 1954.

MLA (9th ed.) Citation

Mamay, Sergius H. Two New Plant Genera of Pennsylvanian Age from Kansas Coal Balls. United States Department of the Interior, Geological Survey, 1954.