APA

World Energy Congress (18th : 2001 oct. 21-25 : Buenos Aires), . (2001). 18th World Energy Congress. Buenos Aires: World Energy Council.

Chicago

World Energy Congress (18th : 2001 oct. 21-25 : Buenos Aires), . 2001. 18th World Energy Congress. Buenos Aires: World Energy Council.

Harvard

World Energy Congress (18th : 2001 oct. 21-25 : Buenos Aires), . (2001). 18th World Energy Congress. Buenos Aires: World Energy Council.

MLA

World Energy Congress (18th : 2001 oct. 21-25 : Buenos Aires), . 18th World Energy Congress. Buenos Aires: World Energy Council. 2001.