Abdul Haris Abdul Karim. (1996). A study of the perception of customer satisfaction towards the supply and services provided by Tenaga Nasional Berhad: Customer satisfaction index survey.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Abdul Haris Abdul Karim. A Study of the Perception of Customer Satisfaction Towards the Supply and Services Provided by Tenaga Nasional Berhad: Customer Satisfaction Index Survey. 1996.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Abdul Haris Abdul Karim. A Study of the Perception of Customer Satisfaction Towards the Supply and Services Provided by Tenaga Nasional Berhad: Customer Satisfaction Index Survey. 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.