APA (7th ed.) Citation

Geological Survey (U.S.), United States. National Aeronautics and Space Administration, & Planetary Geology Program (U.S.). (1991). Topographic map of the Iapygia Northwest quadrangle (MC-21 NW) of Mars. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), United States. National Aeronautics and Space Administration, and Planetary Geology Program (U.S.). Topographic Map of the Iapygia Northwest Quadrangle (MC-21 NW) of Mars. Reston, Va.: The Survey, 1991.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Topographic Map of the Iapygia Northwest Quadrangle (MC-21 NW) of Mars. The Survey, 1991.