References:
https://www.academia.sg/academic-views/elected-president/
REPORT OF THE SELECT COMMITTEE ON THE CONSTITUTION OF THE REPUBLIC OF SINGAPORE (AMENDMENT NO. 3) BILL [BILL NO. 23/90] https://sprs.parl.gov.sg/selectcommittee/selectcommittee/download?id=301&type=report
Mutalib, Hussin. “Singapore’s first elected presidency: The political motivations.” In Managing Political Change in Singapore, pp. 167-187. Routledge, 2013. https://www.taylorfrancis.com/chapters/edit/10.4324/9781315005683-7/singapore-first-elected-presidency-hussin-mutalib