Não informado. (2004). Harvard School of Public Health. Harvard School of Public Health.
Cita Chicago Style (17a ed.)Não informado. Harvard School of Public Health. Cambridge, Inglaterra: Harvard School of Public Health, 2004.
Cita MLA (8a ed.)Não informado. Harvard School of Public Health. Harvard School of Public Health, 2004.
Precaución: Estas citas no son 100% exactas.