APA (7th ed.) Citation

Geological Survey (U.S.). (1999). Shaded Relief. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Shaded Relief. Reston, Va.: The Survey, 1999.

MLA (9th ed.) Citation

Geological Survey (U.S.). Shaded Relief. The Survey, 1999.

Warning: These citations may not always be 100% accurate.