Njord , Levi, Ray Μ Merrill , Rebecca Njord , et al. "Characterizing health behaviors and infectious disease prevalence among Filipino street children" International Journal of Adolescent Medicine and Health, 20.3 (2011): 367-374. Retrieved 20 May. 2013, from doi:10.1515/IJAMH.2008.20.3.367

Njord , L., Merrill , R., Njord , R., et al. (2011). Characterizing health behaviors and infectious disease prevalence among Filipino street children. International Journal of Adolescent Medicine and Health, 20(3), pp. 241-383. Retrieved 20 May. 2013, from doi:10.1515/IJAMH.2008.20.3.367

Njord , Levi, Ray Μ Merrill , Rebecca Njord , et al. 2011. Characterizing health behaviors and infectious disease prevalence among Filipino street children. International Journal of Adolescent Medicine and Health. 20(3): 241-383. Retrieved 20 May. 2013, from doi:10.1515/IJAMH.2008.20.3.367