Ong, H., Puah, C., & Habibullah, M. S. (2004). Business cycles in the US and five ASEAN countries: Are they related? The Philippine Review of Economics.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ong, Hway-Boon, Chin-Hong Puah, و Muzafar Shah Habibullah. "Business Cycles in the US and Five ASEAN Countries: Are They Related?" The Philippine Review of Economics 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ong, Hway-Boon, et al. "Business Cycles in the US and Five ASEAN Countries: Are They Related?" The Philippine Review of Economics, 2004.
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