@book{212027,
	author = {Ospina, William, and Villegas Jiménez, Benjamín,},
	title = {Erase una vez Colombia},
	publisher = {Villegas Editores},
	year = {2005.},
	address = {[Bogotá]},
	url = {http://www.loc.gov/catdir/enhancements/fy0665/2006435299-b.html}
}