Cita APA

World Congress on Air Pollution in Developing Countries (1996 oct. 21-26 : San José, C. (1997). Proceedings. El Salvador: PROECO.

Citación estilo Chicago

World Congress on Air Pollution in Developing Countries (1996 oct. 21-26 : San José, C.R.). Proceedings. El Salvador: PROECO, 1997.

Cita MLA

World Congress on Air Pollution in Developing Countries (1996 oct. 21-26 : San José, C.R.). Proceedings. El Salvador: PROECO, 1997.