(原始内容存档于2020-07-13). West Coast GRC To Be Contested By PAP’s S. Iswaran & DesmondLee, To Face PSP A-Team. 2020-06-30 [2020-07-13]. (原始内容存档于2020-07-12). Singapore
Singapore. 2024-04-15 [2024-05-17] (英语). PMO | Letter Exchange between PM Lee Hsien Loong and President Tharman Shanmugaratnam. Prime Minister's Office