Cite

Official map of Alameda County, California : compiled from official surveys and records and private surveys and published by authority of the Board of Supervisors of Alameda County

MLA

Allardt, G. F., and cartographer. Official Map of Alameda County, California : Compiled from Official Surveys and Records and Private Surveys and Published by Authority of the Board of Supervisors of Alameda County. G.F. Allardt, Britton, Rey & Co., lith.), 1874. https://collections.library.yale.edu/catalog/31923315.

APA, 6th edition

Allardt, G. F., & cartographer. (1874). Official map of Alameda County, California : compiled from official surveys and records and private surveys and published by authority of the Board of Supervisors of Alameda County [Maps]. G.F. Allardt, Britton, Rey & Co., lith.). https://collections.library.yale.edu/catalog/31923315.