Truck kilometers of travel on the California state highway system ...
APA Citation
California. Office of Traffic Improvement. (1994). Truck kilometers of travel on the California state highway system ... [Sacramento?]: California Dept. of Transportation, Office of Traffic Improvement.
MLA Citation
California. Office of Traffic Improvement. Truck Kilometers of Travel On the California State Highway System ... [Sacramento?]: California Dept. of Transportation, Office of Traffic Improvement, 1994.
Warning: These citations may not always be complete (especially for serials).