APA (7th ed.) Citation

Geological Survey (U.S.) & Gehrels, G. E. (1991). Geologic map of Long Island and southern and central Dall Island, southeastern Alaska. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and George E. Gehrels. Geologic Map of Long Island and Southern and Central Dall Island, Southeastern Alaska. Reston, Va.: The Survey, 1991.

MLA (9th ed.) Citation

Geological Survey (U.S.) and George E. Gehrels. Geologic Map of Long Island and Southern and Central Dall Island, Southeastern Alaska. The Survey, 1991.