APA (7th ed.) Citation

Geological Survey (U.S.), Ohio. Division of Geological Survey, & Hildenbrand, T. G. (1988). Gravity anomaly maps of Ohio. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Ohio. Division of Geological Survey, and T. G. Hildenbrand. Gravity Anomaly Maps of Ohio. Reston, Va.: U.S. Geological Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Gravity Anomaly Maps of Ohio. U.S. Geological Survey, 1988.