Não informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Pakistan Journal of Health. Lahore, Paquistao: Institute of Hygiene and Preventive Medicine.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Pakistan Journal of Health. Institute of Hygiene and Preventive Medicine.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.