proceedings of the second confernce of the agricultural development research. (cairo. (1988). proceedings of the second confernce of the agricultural development research. ain shams university.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)proceedings of the second confernce of the agricultural development research. (cairo. Proceedings of the Second Confernce of the Agricultural Development Research. cairo: ain shams university, 1988.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)proceedings of the second confernce of the agricultural development research. (cairo. Proceedings of the Second Confernce of the Agricultural Development Research. ain shams university, 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.