Cita APA (7a ed.)
Romberg, F., & Barnes, V. E. (1949). Correlation of gravity observations with geology of the Coal Creek Serpentine Mass, Blanco and Gillespie Counties, Texas: By Frederick Romberg and Virgil E[verett] Barnes.
Cita Chicago Style (17a ed.)
Romberg, Frederick, y Virgil Everett Barnes. Correlation of Gravity Observations with Geology of the Coal Creek Serpentine Mass, Blanco and Gillespie Counties, Texas: By Frederick Romberg and Virgil E[verett] Barnes. [Lancaster, Pa], 1949.
Cita MLA (9a ed.)
Romberg, Frederick, y Virgil Everett Barnes. Correlation of Gravity Observations with Geology of the Coal Creek Serpentine Mass, Blanco and Gillespie Counties, Texas: By Frederick Romberg and Virgil E[verett] Barnes. 1949.
Precaución: Estas citas no son 100% exactas.