R. Caballero Hoyos, A. Villaseñor Sierra, e A. Hidalgo San Martín, “ Sources of information and their relationship to the degree of knowledge of AIDS, in adolescents of Mexico ”, Rev. saúde pública, vol. 31, nº 4, p. 351–359, ago. 1997, doi: 10.1590/S0034-89101997000400004.