APA

Cardello R. A., Reitz R. A., Smits F. C., Exxon, World Petroleum Congress (11th. : 1983 : London), Reitz R. A., Smits F. C. & Exxon.Catalytic coal gasification development. : .

Chicago

Cardello Ralph A, Reitz Richard A, Smits Frans C.R.M, Exxon, World Petroleum Congress (11th. : 1983 : London), Reitz Richard A, Smits Frans C.R.M and Exxon.Catalytic coal gasification development. : .

Harvard

Cardello R. A., Reitz R. A., Smits F. C., Exxon, World Petroleum Congress (11th. : 1983 : London), Reitz R. A., Smits F. C. and Exxon.Catalytic coal gasification development. : .

MLA

Cardello Ralph A, Reitz Richard A, Smits Frans C.R.M, Exxon, World Petroleum Congress (11th. : 1983 : London), Reitz Richard A, Smits Frans C.R.M and Exxon.: . .