@book{107539,
	author = {Trujillo Arcila, José Daniel and Aguirre Gòmez, Òscar},
	title = {Momentos difíciles },
	publisher = {: Grafitel Litografìa},
	year = {, 2013},
	address = {Pereira, Colombia},
	edition = {Primera ediciòn},
	note = {Incluye ìndice}
}