Khairul Nadiah Ibrahim. (2004). Approaches in continual improvement of an ISO 14001 improvemental management system at Tuanku Ja'afar Steam Power Station, Port Dickson, Negeri Sembilan.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Khairul Nadiah Ibrahim. Approaches in Continual Improvement of an ISO 14001 Improvemental Management System at Tuanku Ja'afar Steam Power Station, Port Dickson, Negeri Sembilan. 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Khairul Nadiah Ibrahim. Approaches in Continual Improvement of an ISO 14001 Improvemental Management System at Tuanku Ja'afar Steam Power Station, Port Dickson, Negeri Sembilan. 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.