Rangel Jiménez, A. E., & Portilla Salazar, C. J. (2016). The substitution process of heavy fuel oil with natural gas in the industrial sector of Valle del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Rangel Jiménez, Andrés Eduardo, i Carlos Johnny Portilla Salazar. The Substitution Process of Heavy Fuel Oil with Natural Gas in the Industrial Sector of Valle Del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia, 2016.
MLA način citiranja (9. izdanje)Rangel Jiménez, Andrés Eduardo, i Carlos Johnny Portilla Salazar. The Substitution Process of Heavy Fuel Oil with Natural Gas in the Industrial Sector of Valle Del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia, 2016.
