Cite
MLA (8th Edition)
The Ishtar Terra Region of Venus In Four Map Sheets. U.S. Geological Survey, For sale by USGS Information Services, 1998.
APA (7th Edition)
The Ishtar Terra region of Venus in four map sheets. (1998). U.S. Geological Survey, For sale by USGS Information Services.
Chicago (17th Edition)
“The Ishtar Terra Region of Venus in Four Map Sheets.” Reston, Virginia: U.S. Geological Survey, For sale by USGS Information Services, 1998.