Urrea Giraldo, Fernando. “Comments about the Book Laboar Informality in Colombia 1988-2000. Evolution, Theories and Models by José Ignacio Uribe and Carlos Humberto Ortiz”. Sociedad Y Economía, no. 16, Jan. 2009, pp. 195-7, https://doi.org/10.25100/sye.v0i16.4085.