Noorul Iffa binti Mohd Nayan. (2014). Significant indicators in the assessment of environmental tourism carrying capacity (ETCC): A case study at Royal Belum State Park, Perak Darul Ridzuan. Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Noorul Iffa binti Mohd Nayan. Significant Indicators in the Assessment of Environmental Tourism Carrying Capacity (ETCC): A Case Study at Royal Belum State Park, Perak Darul Ridzuan. Kuala Lumpur: Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2014.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Noorul Iffa binti Mohd Nayan. Significant Indicators in the Assessment of Environmental Tourism Carrying Capacity (ETCC): A Case Study at Royal Belum State Park, Perak Darul Ridzuan. Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2014.