【9】卓源利，“青山内外尽胶园，宏茂桥里话当年”—青山内的前世今生，https://www.facebook.com/groups/265763383605892/?post_id=999680316880858 accessed 25 June 2020.
【10】卓源利，“宗亲云集成大姓，南来聚居似家村”—卓姓聚居的杨厝港六巡村，https://www.facebook.com/groups/265763383605892/?post_id=1218631388319082 accessed 25 June 2020.
【11】Housing and Development Board, https://www.hdb.gov.sg/cs/infoweb/about-us/history/hdb-townsyour-home/ang-mo-kio accessed 12 June 2020.
【12】Municipal committee, Singapore Free Press and Mercantile Advertiser, 17 May 1855.
（作者为英国皇家造船师学会会士、自由文史工作者）
