Ong, K. Y. (2016). Ong Keng Yong [Singapore, Ministry of Foreign Affairs, Civil Service]. Institutional Knowledge at Singapore Management University.
استشهاد بنمط شيكاغوOng, Keng Yong. Ong Keng Yong [Singapore, Ministry of Foreign Affairs, Civil Service]. Institutional Knowledge at Singapore Management University, 2016.
MLA استشهادOng, Keng Yong. Ong Keng Yong [Singapore, Ministry of Foreign Affairs, Civil Service]. Institutional Knowledge at Singapore Management University, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.