Mera, A. M., A. G. Pozo, e J. S. Ollero. Occupational Variations in the Returns to Education and Experience in the Spanish Hospitality Sector: A Comparative Analysis. Revista Turismo & Desenvolvimento, Vol. 3, n. 13/14, Jan. 2010, pp. 953-4, doi:10.34624/rtd.v3i13/14.12593.