APA

Cummings G. H., American Institute of Chemical Engineers, . (1973). The petroleumm petrochemical industry and the eological challenge. New York, NY: American Institute of Chemical Engineers.

Chicago

Cummings George H, American Institute of Chemical Engineers, . 1973. The petroleumm petrochemical industry and the eological challenge. New York, NY: American Institute of Chemical Engineers.

Harvard

Cummings G. H., American Institute of Chemical Engineers, . (1973). The petroleumm petrochemical industry and the eological challenge. New York, NY: American Institute of Chemical Engineers.

MLA

Cummings George H, American Institute of Chemical Engineers, . The petroleumm petrochemical industry and the eological challenge. New York, NY: American Institute of Chemical Engineers. 1973.