@book{1975,
	author = {Boullón, Roberto C},
	title = {Planificación del espacio turístico /},
	publisher = {Trillas,},
	year = {2006.},
	address = {México, D.F. :},
	edition = {4a ed.},
	url = {https://isae.metabiblioteca.org/cgi-bin/koha/opac-retrieve-file.pl?id=134b0ae87ebc0e229ee6b17277931e37}
}