1. The Elevator Museum. Available at: http://www.theelevatormuseum.org/. Accessed on 29 March 2018.
2. United States Consumer Product Safety Commission. Available at: https://www.cpsc.gov/content/know-the-steps-to-safety-when-using-escalators some-shoes-more-likely-than-others-to-pose. Accessed on 3 April 2018.
3. CNN. Chinese mother saves son seconds before falling to death inside escalator. 29 July 2015. Available at: http://edition.cnn.com/2015/07/27/china/chinese-mother-killed-escalator/index.html. Accessed on 29 March 2018.
4. The New Paper. Passer-by rushes to help boy whose foot was caught in escalator. 26 January 2016. Available at: http://www.tnp.sg/news/singapore-news/passer-rushes-help-boy-whose-foot-was-caught-escalator. Accessed on 29 March 2018.
5. The Straits Times. Woman escapes injury after escalator step suddenly breaks apart at The Arcade at Raffles Place. 6 January 2016. Available at: http://www.straitstimes.com/singapore/woman-escapes-injury-after-escalator-step-suddenly-breaks-apart-at-the-arcade-at-raffles. Accessed on 29 March 2018.