Sánchez Jiménez, M. Ángel. “Analysis of the Return on Investment (ROI) of the Activity in the Social Networks of the Andalusian Provinces As a Tourist Destination”. PASOS Revista De Turismo Y Patrimonio Cultural, vol. 16, no. 4, Oct. 2018, pp. 1067-88, doi:10.25145/j.pasos.2018.16.074.