1. Guidelines for Assessing the Risk to Groundwater from On-site Sanitation. BGS Commissioned Report CR/01/142, British Geological Survey, Robens Centre for Public and Environmental Health;ARGOSS,2001
2. BBS/UNICEF (2011) Bangladesh National Drinking Water Quality Survey of 2009; Bangladesh Bureau of Statistics and UNICEF, 196 pages.
3. BBTKLPP (2015) Survei Kualitas Air 2015 [SKA 2015] PEDOMAN PENGAMBIL SAMPEL AIR, BBTKLPP, Yogyakarta, MoH,. 27 pages.
4. BPS (2016a) Mewujudkan Aksesibilitas Air Minum dan Sanitasi yang Aman dan Berkelanjutan Bagi Semua 2015_Hasil Survei Kualitas Air di Daerah Istimewa Yogyakarta Tahun 2015, BPS, 2016. https://www.bps.go.id/index.php/publikasi/index?Publikasi%5BtahunJudul%5D=&Publikasi%5BkataKunci%5D=kualitas(air&yt0 = Show, Accessed in February, 2017.
5. BPS (2016b) Hasil Survei Kualitas Air di Daerah Istimewa Yogyakarta Tahun 2015, BPS, 2016. https://www.bps.go.id/index.php/publikasi/index?Publikasi%5BtahunJudul%5D=&Publikasi%5BkataKunci%5D=kualitas(air&yt0 = Show, Accessed in February, 2017.