U.S. Environmental Protection Agency. Profile of the petroleum refining industry.
Citazione stile Chigago Style (17a edizione)U.S. Environmental Protection Agency. Profile of the Petroleum Refining Industry.
Citatione MLA (9a ed.)U.S. Environmental Protection Agency. Profile of the Petroleum Refining Industry.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.