@book{13369,
	author = {Tamayo y Tamayo, Mario and Instituto Colombiano de Estudios Superiores de Incolda (Cali)},
	title = {El proyecto de investigación :},
	publisher = {ICFES,},
	year = {1999.},
	series = {Serie Aprender a Investigar ; 5},
	address = {Bogotá :},
	edition = {3a ed.}
}