Ismail, M. H. (2008). The Role Of Interpretive Signages In Enhancing Conservation Knowledge, Awareness And Behavior Among Visitors At The Penang National Park, Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ismail, Mohd Hafizal. The Role Of Interpretive Signages In Enhancing Conservation Knowledge, Awareness And Behavior Among Visitors At The Penang National Park, Malaysia. 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ismail, Mohd Hafizal. The Role Of Interpretive Signages In Enhancing Conservation Knowledge, Awareness And Behavior Among Visitors At The Penang National Park, Malaysia. 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.