Map of [California] / U.S. Dept. of Agriculture, Bureau of Public Roads, Irrigation Investigations. Map of Northern California. Map of Central California. Map of Southern California

Chicago citation style
United States. Bureau of Public Roads. Map of [California] / U.S. Dept. of Agriculture, Bureau of Public Roads, Irrigation Investigations. Map of Northern California. Map of Central California. Map of Southern California. 1922. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/236. (Accessed April 3, 2020.)
APA citation style
United States. Bureau of Public Roads, (1922) Map of [California] / U.S. Dept. of Agriculture, Bureau of Public Roads, Irrigation Investigations. Map of Northern California. Map of Central California. Map of Southern California. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/236
MLA citation style
United States. Bureau of Public Roads. Retrieved from the Digital Public Library of America <http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/236>.
Note: These citations are programmatically generated and may be incomplete.