Pipeline safety regulations :
enforcement procedures part 190, natural gas parts 191-192, liquefied natural gas part 193, oil pipelines response plans part 194, hazardous liquids part 195, state grants part 198, drug testing part 199.

APA Citation

United States. Department of Transportation. Research and Special Programs Administration. (1998). Pipeline safety regulations: enforcement procedures part 190, natural gas parts 191-192, liquefied natural gas part 193, oil pipelines response plans part 194, hazardous liquids part 195, state grants part 198, drug testing part 199. Rev. as of Oct. 1, 1998. [Washington, D.C.?]: U.S. Dept. of the Transportation, Research and Special Programs Administration.

MLA Citation

United States. Department of Transportation. Research and Special Programs Administration. Pipeline Safety Regulations: Enforcement Procedures Part 190, Natural Gas Parts 191-192, Liquefied Natural Gas Part 193, Oil Pipelines Response Plans Part 194, Hazardous Liquids Part 195, State Grants Part 198, Drug Testing Part 199. Rev. as of Oct. 1, 1998. [Washington, D.C.?]: U.S. Dept. of the Transportation, Research and Special Programs Administration, 1998.

Warning: These citations may not always be complete (especially for serials).