APA (7th ed.) Citation

Geological Survey (U.S.) & Richter, D. H. (1979). Geologic map of the Gulkana A-2 quadrangle, Alaska. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Donald H. Richter. Geologic Map of the Gulkana A-2 Quadrangle, Alaska. Reston, Va.: The Survey, 1979.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Donald H. Richter. Geologic Map of the Gulkana A-2 Quadrangle, Alaska. The Survey, 1979.

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