@book{koh2011brighter,
  title = {Brighter: ELECTRICITY IN SINGAPORE: FROM BEGINNING TO BEYOND}
  author = {KOH BUCK SONG
AND
LEE GEOK BOI},
  url = {https://www.ema.gov.sg/cmsmedia/Publications_and_Statistics/Publications/Commemorative%20Book/Brighter_EMA_2011.pdf},
  year = {2011}
}