APA (7th ed.) Citation

Geological Survey (U.S.) & Mark, R. K. (1992). Map of debris-flow probability, San Mateo County, California. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Robert K. Mark. Map of Debris-flow Probability, San Mateo County, California. Reston, VA: The Survey, 1992.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Robert K. Mark. Map of Debris-flow Probability, San Mateo County, California. The Survey, 1992.