Não informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Pakistan Journal of Health. Lahore, Paquistao: Institute of Hygiene and Preventive Medicine.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.