"2019 Affordability Report". Alliance for Affordable Internet (İngilizce). 30 Aralık 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 25 Eylül 2020.
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Bartram, Jamie; Brocklehurst, Clarissa; Bradley, David; Muller, Mike; Evans, Barbara (December 2018). "Policy review of the means of implementation targets and indicators for the sustainable development goal for water and sanitation". npj Clean Water. 1 (1): 3. doi:10.1038/s41545-018-0003-0. Text was copied from this source, which is available under a Creative Commons Attribution 4.0 International License
Bartram, Jamie; Brocklehurst, Clarissa; Bradley, David; Muller, Mike; Evans, Barbara (December 2018). "Policy review of the means of implementation targets and indicators for the sustainable development goal for water and sanitation". npj Clean Water. 1 (1): 3. doi:10.1038/s41545-018-0003-0. Text was copied from this source, which is available under a Creative Commons Attribution 4.0 International License
"2019 Affordability Report". Alliance for Affordable Internet (İngilizce). 30 Aralık 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 25 Eylül 2020.
"Press Release". www.itu.int. 30 Aralık 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 25 Eylül 2020.