Richfield Oil Company. 1931 Edition. Official Highway Map of California. (insets) San Francisco and Vicinity. Lake Tahoe. Sacramento. Stockton. Fresno. San Diego. San Francisco Bay Cities. Los Angeles. Official Highway Map of Los Angeles and VicinityRichfield Roads to Roam1931 Edition. Official Highway Map of California

Chicago citation style
Richfield Oil Company of California, The W.C. Eubank Co. Richfield Oil Company. 1931 Edition. Official Highway Map of California. (insets) San Francisco and Vicinity. Lake Tahoe. Sacramento. Stockton. Fresno. San Diego. San Francisco Bay Cities. Los Angeles. Official Highway Map of Los Angeles and Vicinity,Richfield Roads to Roam,1931 Edition. Official Highway Map of California. 1930. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290434~90061993. (Accessed December 11, 2018.)
APA citation style
Richfield Oil Company of California, The W.C. Eubank Co, (1930) Richfield Oil Company. 1931 Edition. Official Highway Map of California. (insets) San Francisco and Vicinity. Lake Tahoe. Sacramento. Stockton. Fresno. San Diego. San Francisco Bay Cities. Los Angeles. Official Highway Map of Los Angeles and Vicinity,Richfield Roads to Roam,1931 Edition. Official Highway Map of California. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290434~90061993
MLA citation style
Richfield Oil Company of California, The W.C. Eubank Co. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290434~90061993>.
Note: These citations are programmatically generated and may be incomplete.