Widad Mohd Ismail. (2019). The effect of tourism activities towards natural resource conservation in Kilim Karst Geoforest Park, Langkawi. Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Widad Mohd Ismail. The Effect of Tourism Activities Towards Natural Resource Conservation in Kilim Karst Geoforest Park, Langkawi. Kuala Lumpur: Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Widad Mohd Ismail. The Effect of Tourism Activities Towards Natural Resource Conservation in Kilim Karst Geoforest Park, Langkawi. Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.