Cite
MLA (8th Edition)
Topographic Map of Mars. U.S. Geological Survey, For sale by U.S. Geological Survey, Map Distribution, 1991.
APA (7th Edition)
Topographic map of Mars. (1991). U.S. Geological Survey, For sale by U.S. Geological Survey, Map Distribution.
Chicago (17th Edition)
“Topographic Map of Mars.” Reston, Va.: U.S. Geological Survey, For sale by U.S. Geological Survey, Map Distribution, 1991.