International Conference on Civil and Structural Engineering Computing London, England, & Topping, B. H. V. (1989). Civil-Comp 89: Proceedings of the Forth International Conference on Civil and Structural Engineering Computing. Civil-Comp Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Conference on Civil and Structural Engineering Computing London, England, و B. H. V. Topping. Civil-Comp 89: Proceedings of the Forth International Conference on Civil and Structural Engineering Computing. Edinburgh: Civil-Comp Press, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Conference on Civil and Structural Engineering Computing London, England, و B. H. V. Topping. Civil-Comp 89: Proceedings of the Forth International Conference on Civil and Structural Engineering Computing. Civil-Comp Press, 1989.