APA (7th ed.) Citation

Geological Survey (U.S.) & Pitt, A. M. (1989). Map showing earthquake epicenters (1964-81) in Yellowstone National Park and vicinity, Wyoming, Idaho, and Montana. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and A. M. Pitt. Map Showing Earthquake Epicenters (1964-81) in Yellowstone National Park and Vicinity, Wyoming, Idaho, and Montana. Reston, Va.: The Survey, 1989.

MLA (9th ed.) Citation

Geological Survey (U.S.) and A. M. Pitt. Map Showing Earthquake Epicenters (1964-81) in Yellowstone National Park and Vicinity, Wyoming, Idaho, and Montana. The Survey, 1989.