@book{49612,
	author = {Almeida Filho, Naomar de and Rouquayrol, Maria Zélia},
	title = {Introducción a la epidemiología},
	publisher = {Lugar editorial,},
	year = {2008},
	series = {Didáctica},
	address = {Argentina:},
	note = {Incluye apéndice},
	url = {http://biblioteca.unac.edu.co/portadas/12176.jpg}
}