Ngiu, C. S. (2010). Construction and validation of a new gastro-oesophageal reflux disease questionnaire in Malay language for the Malay ethnic population. Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ngiu, Chai Soon. Construction and Validation of a New Gastro-oesophageal Reflux Disease Questionnaire in Malay Language for the Malay Ethnic Population. Kuala Lumpur: Universiti Kebangsaan Malaysia, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ngiu, Chai Soon. Construction and Validation of a New Gastro-oesophageal Reflux Disease Questionnaire in Malay Language for the Malay Ethnic Population. Universiti Kebangsaan Malaysia, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.