6 October 2011 [2013-01-12]. (原始内容存档于2013-08-26). Brief for the Minister of Foreign Affairs March 2012 (PDF). (原始内容 (PDF)存档于2013-01-16). Sam Worthington
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Seminar at Singapore Aviation Academy (新闻稿). Ministry of HomeAffairs. 2006-04-12 [2006-11-03]. [永久失效連結] Counter Terrorism Efforts at Singapore’s Changi