APA (7th ed.) Citation

Force, E. R., & Dunbar, J. D. F. (1977). Geologic map of the Gbanka quadrangle, Liberia. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Force, Eric R., and J. D. F. Dunbar. Geologic Map of the Gbanka Quadrangle, Liberia. Reston, Va.: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

Force, Eric R., and J. D. F. Dunbar. Geologic Map of the Gbanka Quadrangle, Liberia. U.S. Geological Survey, 1977.

Warning: These citations may not always be 100% accurate.