APA (7th ed.) Citation

Barnes, V. E. (1970). Geologic map of the North Grape Creek Quadrangle, Blanco and Gillespie Counties, Texas. Bureau of Economic Geology, University of Texas.

Chicago Style (17th ed.) Citation

Barnes, Virgil E. Geologic Map of the North Grape Creek Quadrangle, Blanco and Gillespie Counties, Texas. Austin, Tex.: Bureau of Economic Geology, University of Texas, 1970.

MLA (9th ed.) Citation

Barnes, Virgil E. Geologic Map of the North Grape Creek Quadrangle, Blanco and Gillespie Counties, Texas. Bureau of Economic Geology, University of Texas, 1970.