Sumatra 2017

Sumatra. 2017. Encyclopaedia Britannica Online. In.

https://www.britannica.com/place/Sumatra

@incollection{sumatra2017,
  author = {Sumatra},
  title  = {Encyclopaedia Britannica Online},
  url    = {https://www.britannica.com/place/Sumatra},
  year   = {2017}
}