APA (7th ed.) Citation

Geological Survey (U.S.), Takahashi, K. I., Cunningham, K. I., & Varnes, K. L. (1987). Map showing wells drilled for oil and gas deeper than 20,000 feet in the conterminous United States and offshore. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), K. I. Takahashi, K. I. Cunningham, and Katharine L. Varnes. Map Showing Wells Drilled for Oil and Gas Deeper than 20,000 Feet in the Conterminous United States and Offshore. Reston, Va.: The Survey, 1987.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Map Showing Wells Drilled for Oil and Gas Deeper than 20,000 Feet in the Conterminous United States and Offshore. The Survey, 1987.