Ngu, L. H. (2004). Development and performance test of a separation system for removal of physically emulsified and free oils from wastewaters.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ngu, Lock Hei. Development and Performance Test of a Separation System for Removal of Physically Emulsified and Free Oils from Wastewaters. 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ngu, Lock Hei. Development and Performance Test of a Separation System for Removal of Physically Emulsified and Free Oils from Wastewaters. 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.