APA (7th ed.) Citation

California. Division of Highways, California. Division of Traffic Engineering, California. Office of Traffic Engineering, California. Office of Traffic, & United States. Bureau of Public Roads. (1968). Traffic volumes on the California state highway system. The Division.

Chicago Style (17th ed.) Citation

California. Division of Highways, California. Division of Traffic Engineering, California. Office of Traffic Engineering, California. Office of Traffic, and United States. Bureau of Public Roads. Traffic Volumes on the California State Highway System. Sacramento, Calif: The Division, 1968.

MLA (9th ed.) Citation

California. Division of Highways, et al. Traffic Volumes on the California State Highway System. The Division, 1968.