Niza Samsuddin. (2005). A study of carboxyhaemoglobin level and neuropsychological symptoms among highway tollbooth operators in the Klang Valley. Fakulti Perubatan, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Niza Samsuddin. A Study of Carboxyhaemoglobin Level and Neuropsychological Symptoms Among Highway Tollbooth Operators in the Klang Valley. Kuala Lumpur: Fakulti Perubatan, Universiti Kebangsaan Malaysia, 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Niza Samsuddin. A Study of Carboxyhaemoglobin Level and Neuropsychological Symptoms Among Highway Tollbooth Operators in the Klang Valley. Fakulti Perubatan, Universiti Kebangsaan Malaysia, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.