Sayed-Ahmad, M. H. M., & unknown. (1980). Environmental considerations in planning of urban areas - a case study of Dammam-Khobar-Dhahran area.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sayed-Ahmad, Muhammad Hamdi Mustafa, و unknown. Environmental Considerations in Planning of Urban Areas - a Case Study of Dammam-Khobar-Dhahran Area. 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Sayed-Ahmad, Muhammad Hamdi Mustafa, و unknown. Environmental Considerations in Planning of Urban Areas - a Case Study of Dammam-Khobar-Dhahran Area. 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.