Não informado. (1998). American journal of hygiene. Johns Hopkins University, School of Hygiene and Public Health.
Cita Chicago Style (17a ed.)Não informado. American Journal of Hygiene. Baltimore, Md: Johns Hopkins University, School of Hygiene and Public Health, 1998.
Cita MLA (8a ed.)Não informado. American Journal of Hygiene. Johns Hopkins University, School of Hygiene and Public Health, 1998.
Precaución: Estas citas no son 100% exactas.