Não informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
Cita Chicago Style (17a ed.)Não informado. Pakistan Journal of Health. Lahore, Paquistao: Institute of Hygiene and Preventive Medicine.
Cita MLA (8a ed.)Não informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
Precaución: Estas citas no son 100% exactas.