"Island Line". Highways Department The Government of the Hong Kong Special Administrative Region. 14 April 2015. Archived from the original on 27 April 2016. Retrieved 25 May 2015.
"MTR Patronage Updates". MTR Corporation Limited. 2019. Retrieved 1 July 2019. Note that: 1) The "daily average" of MTR lines from this link actually means the "weekday average". The real daily average of MTR lines equals to the "monthly total" divided by the number of days in that month. 2) The rapid transit includes "domestic service", "Airport Express" and "cross-boundary". 3) "Others" includes "Intercity, light rail, and bus" and "HSR".
"Island Line". Highways Department The Government of the Hong Kong Special Administrative Region. 14 April 2015. Archived from the original on 27 April 2016. Retrieved 25 May 2015.
