Alvis-Guzmán, N. (2012). The cost of connecting poor households to natural gas in Colombia and its impact on health, 2007. Universidad Nacional de Colombia.
Citazione stile Chigago Style (17a edizione)Alvis-Guzmán, Nelson. The Cost of Connecting Poor Households to Natural Gas in Colombia and Its Impact on Health, 2007. Universidad Nacional de Colombia, 2012.
Citatione MLA (9a ed.)Alvis-Guzmán, Nelson. The Cost of Connecting Poor Households to Natural Gas in Colombia and Its Impact on Health, 2007. Universidad Nacional de Colombia, 2012.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.