Ismail, M. I. (2020). Unsuccessful quitters among smokers in stop smoking services in Perlis: The proportion and its associated factors.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ismail, Muhammad Ikhwan. Unsuccessful Quitters Among Smokers in Stop Smoking Services in Perlis: The Proportion and Its Associated Factors. 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ismail, Muhammad Ikhwan. Unsuccessful Quitters Among Smokers in Stop Smoking Services in Perlis: The Proportion and Its Associated Factors. 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.