Geologic map of the Lake Mathews 7.5ʹ quadrangle, Riverside County, California
MLA
Morton, Douglas M., et al. Geologic map of the Lake Mathews 7.5ʹ quadrangle, Riverside County, California. Last modified: 1/15/02. [Reston, Va.?] : U.S. Geological Survey, 2002.
APA
Morton, D., Weber, F., Diep, V., Edwards-Howells, U., Geological Survey (U.S.) & California. (2002). Geologic map of the Lake Mathews 7.5ʹ quadrangle, Riverside County, California. Last modified: 1/15/02. [Reston, Va.?] : U.S. Geological Survey.
Chicago
Morton, Douglas M., F. Harold Weber, Van M. Diep, Ursula Edwards-Howells, Geological Survey (U.S.) and California. Geologic map of the Lake Mathews 7.5ʹ quadrangle, Riverside County, California. Last modified: 1/15/02. [Reston, Va.?] : U.S. Geological Survey, 2002.