Lew, L. H. (2011). Effects of speech and voice changes on the quality of life of people with parkinson's disease.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lew, Lai Heong. Effects of Speech and Voice Changes on the Quality of Life of People with Parkinson's Disease. 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lew, Lai Heong. Effects of Speech and Voice Changes on the Quality of Life of People with Parkinson's Disease. 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.