APA (7th ed.) Citation

Morton, D. M., Weber, F. H., Diep, V. M., & Edwards-Howells, U. (2002). Geologic map of the Lake Mathews 7.5ʹ quadrangle, Riverside County, California (Last modified: 1/15/02.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Morton, Douglas M., F. Harold Weber, Van M. Diep, and Ursula Edwards-Howells. Geologic Map of the Lake Mathews 7.5ʹ Quadrangle, Riverside County, California. Last modified: 1/15/02. [Reston, Va.?]: U.S. Geological Survey, 2002.

MLA (9th ed.) Citation

Morton, Douglas M., et al. Geologic Map of the Lake Mathews 7.5ʹ Quadrangle, Riverside County, California. Last modified: 1/15/02. U.S. Geological Survey, 2002.