APA

Shaw J., Zoschak R., World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) & Zoschak R.Environmentally acceptable direct use of heavy fuels. : .

Chicago

Shaw J.H, Zoschak R.J, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Zoschak R.J.Environmentally acceptable direct use of heavy fuels. : .

Harvard

Shaw J., Zoschak R., World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Zoschak R.Environmentally acceptable direct use of heavy fuels. : .

MLA

Shaw J.H, Zoschak R.J, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest) and Zoschak R.J.: . .