Regional Conference for Africa on Soil Mechanics and Foundation Engineering Lagos, Nigeria, Akinmusuru, J. O., Malomo, S. S., & Mesida, E. A. (1987). Soil mechanics and foundation engineering ninth Regional Conference for Africa: Proceedings of the ninth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Lagos, September 1987. Balkema.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Regional Conference for Africa on Soil Mechanics and Foundation Engineering Lagos, Nigeria, J. O. Akinmusuru, S. S. Malomo, و E. A. Mesida. Soil Mechanics and Foundation Engineering Ninth Regional Conference for Africa: Proceedings of the Ninth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Lagos, September 1987. Rotterdam: Balkema, 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Regional Conference for Africa on Soil Mechanics and Foundation Engineering Lagos, Nigeria, et al. Soil Mechanics and Foundation Engineering Ninth Regional Conference for Africa: Proceedings of the Ninth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Lagos, September 1987. Balkema, 1987.