Ahmad Rafidi Lebai Kamaludin. (2013). Comparing the success rate of nasogastric tube insertion using the head flexion, lateral neck pressure and the head in neutral position in anaesthetised, intubated and paralysed patients. Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahmad Rafidi Lebai Kamaludin. Comparing the Success Rate of Nasogastric Tube Insertion Using the Head Flexion, Lateral Neck Pressure and the Head in Neutral Position in Anaesthetised, Intubated and Paralysed Patients. Kuala Lumpur: Universiti Kebangsaan Malaysia, 2013.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahmad Rafidi Lebai Kamaludin. Comparing the Success Rate of Nasogastric Tube Insertion Using the Head Flexion, Lateral Neck Pressure and the Head in Neutral Position in Anaesthetised, Intubated and Paralysed Patients. Universiti Kebangsaan Malaysia, 2013.