Business Week, March 11, 2010, A Food Fight for Hugo Chavez "Datanálisis: Mercal es el lugar preferido para comprar alimentos" (in Spanish).
El Universal (July 31, 2006). ^ Business Week, March 11, 2010, A Food Fight for Hugo Chavez ^ “Datanálisis: Mercal es el lugar preferido para comprar alimentos” (bằng tiếng Tây Ban Nha).