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"Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
California State Assembly. "Relating to the Seaside Freeway". 1959 Session of the Legislature. Statutes of California (House Resolution). State of California. Ch. 144 p. 3502. "That the California Highway Commission is requested to declare the added portion of Route 167 which will connect the Harbor Freeway and the Long Beach Freeway to be a freeway, to be known as the Seaside Freeway..."
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original(XLS file) on September 5, 2015. Retrieved June 30, 2015.