Ong, C. B. H. (2002). Quality of tap water in 20 selected areas in Selangor / Christine Ong Boon Hwee.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOng, Christine Boon Hwee. Quality of Tap Water in 20 Selected Areas in Selangor / Christine Ong Boon Hwee. 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOng, Christine Boon Hwee. Quality of Tap Water in 20 Selected Areas in Selangor / Christine Ong Boon Hwee. 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.