@misc{dr2018journey,
  title = {Journey of Singapore, the Green Dot.}
  author = {Dr. John Keung},
  url = {https://gettingtozeroforum.org/wp-content/uploads/sites/2/2018/04/Keung_JourneyofSingapore_SustainabilityEffortsfinalv4.pdf},
  year = {2018}
}