Ng, C. P. (2019). Relative improvements in road mobility compared to improvements in road accessibility, urbanization and economic growth.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ng, Choy Peng. Relative Improvements in Road Mobility Compared to Improvements in Road Accessibility, Urbanization and Economic Growth. 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ng, Choy Peng. Relative Improvements in Road Mobility Compared to Improvements in Road Accessibility, Urbanization and Economic Growth. 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.