RODRÍGUEZ T., J. .; FERNÁNDEZ, A. M. .; VALDÉS C., M. .; HERNÁNDEZ A., E. .; RAMÍREZ P., S. .; ROMÁN Q., A. . A comparison of the peers method and traditional methodologies, and risk behaviors in studies of the prevalence of drug consumption in a population of female, chilean students. The Spanish Journal of Psychology, v. 11, n. 2, p. 564–572, 1 Jan.2008.