Cite

The official map of Orange County, California and portions of adjoining counties : compiled from official and private surveys.

MLA

The Official Map of Orange County, California and Portions of Adjoining Counties : Compiled from Official and Private Surveys. Orange County Board of Supervisors, 1958. https://collections.library.yale.edu/catalog/15818725.

APA, 6th edition

The official map of Orange County, California and portions of adjoining counties : compiled from official and private surveys. (1958). [Maps]. Orange County Board of Supervisors, https://collections.library.yale.edu/catalog/15818725.