@book{161780,
	author = {Boullón, Roberto C.},
	title = {Las actividades turísticas y recreacionales},
	publisher = {Editorial Trillas},
	year = {1990 (1995 printing)},
	series = {Serie Trillas turismo México.},
	address = {México, D.F.},
	edition = {3a. ed.},
	note = {Incluye índice.}
}