APA (7th ed.) Citation

Morris, E. C., & Dwornik, S. E. (1978). Geologic map of the Amazonis quadrangle of Mars. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Morris, E. C., and Stephen E. Dwornik. Geologic Map of the Amazonis Quadrangle of Mars. Reston, Va.: U.S. Geological Survey, 1978.

MLA (9th ed.) Citation

Morris, E. C., and Stephen E. Dwornik. Geologic Map of the Amazonis Quadrangle of Mars. U.S. Geological Survey, 1978.