@book{18,
	author = {Gray, Clifford F.},
	title = {Administración de proyectos / },
	publisher = {McGraw Hill,},
	year = {2009.},
	address = {México : },
	edition = {cuarta edicion},
	note = {Incluye índice.},
	url = {https://isae.metabiblioteca.org/cgi-bin/koha/opac-retrieve-file.pl?id=660fd6109d5cc129bf8f29f645cea3ba}
}