APA (7th ed.) Citation

Luft, S. J. (1973). Geologic map of the Walton quadrangle, north-central Kentucky. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Luft, Stanley Jeremie. Geologic Map of the Walton Quadrangle, North-central Kentucky. Washington, D.C.: U.S. Geological Survey, 1973.

MLA (9th ed.) Citation

Luft, Stanley Jeremie. Geologic Map of the Walton Quadrangle, North-central Kentucky. U.S. Geological Survey, 1973.