APA

Celentano G. J. A., Repsol YPF, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires) & Repsol YPF.The XXI century energy transformation. : .

Chicago

Celentano Guillermo Juan Antonio, Repsol YPF, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires) and Repsol YPF.The XXI century energy transformation. : .

Harvard

Celentano G. J. A., Repsol YPF, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires) and Repsol YPF.The XXI century energy transformation. : .

MLA

Celentano Guillermo Juan Antonio, Repsol YPF, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires) and Repsol YPF.: . .