@book{centre2012water,
  title = {Water: From Scarce Resource to National Asset Singapore‘s Urban Systems Studies Booklet Series}
  author = {Centre for Liveable Cities
Ministry of National Development, Singapore
Public Utilities Board
Ministry of the Environment and Water Resources, Singapore},
  url = {https://www.clc.gov.sg/docs/default-source/urban-systems-studies/uss-water.pdf},
  year = {2012}
}