APA

Churchill A., World Bank, World Petroleum Congress (13th. : 1991 : Buenos Aires) & World Bank.Financing the oil industry in the 1990s. : .

Chicago

Churchill A.A, World Bank, World Petroleum Congress (13th. : 1991 : Buenos Aires) and World Bank.Financing the oil industry in the 1990s. : .

Harvard

Churchill A., World Bank, World Petroleum Congress (13th. : 1991 : Buenos Aires) and World Bank.Financing the oil industry in the 1990s. : .

MLA

Churchill A.A, World Bank, World Petroleum Congress (13th. : 1991 : Buenos Aires) and World Bank.: . .