Cita APA (7a ed.)

Hill, R. T. (1899). Map of the black and grand prairies of Texas. U. S Geological Survey.

Cita Chicago Style (17a ed.)

Hill, Robert T. Map of the Black and Grand Prairies of Texas. Texas: U. S Geological Survey, 1899.

Cita MLA (9a ed.)

Hill, Robert T. Map of the Black and Grand Prairies of Texas. U. S Geological Survey, 1899.