APA (7th ed.) Citation

Geological Survey (U.S.) & Burkhard, N. (1980). Free-air gravity anomaly map, eastern Gulf of Alaska. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Nardia Burkhard. Free-air Gravity Anomaly Map, Eastern Gulf of Alaska. Reston, Va.: The Survey, 1980.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Nardia Burkhard. Free-air Gravity Anomaly Map, Eastern Gulf of Alaska. The Survey, 1980.