Chang, Y., Putra, N. A., & Studies, S. R. S. o. I. (2009). Energy security in Singapore: Challenges and opportunities.
استشهاد بنمط شيكاغوChang, Youngho, Nur Azha Putra, و S. Rajaratnam School of International Studies. Energy Security in Singapore: Challenges and Opportunities. 2009.
MLA استشهادChang, Youngho, Nur Azha Putra, و S. Rajaratnam School of International Studies. Energy Security in Singapore: Challenges and Opportunities. 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.