Road map of the state of California / compiled from maps by the United States government and from various county maps, under the direction of Austin B. Fletcher, highway engineer ; drawn and compiled by Franklin P. Borgnis.
MLA
Borgnis, Franklin P. Road Map of the State of California / Compiled from Maps by the United States Government and from Various County Maps, under the Direction of Austin B. Fletcher, Highway Engineer ; Drawn and Compiled by Franklin P. Borgnis. The Commission, 1916. https://collections.library.yale.edu/catalog/15821492.
APA, 6th edition
Borgnis, F. P. (1916). Road map of the state of California / compiled from maps by the United States government and from various county maps, under the direction of Austin B. Fletcher, highway engineer ; drawn and compiled by Franklin P. Borgnis. [Road maps]. The Commission, https://collections.library.yale.edu/catalog/15821492.