Não informado. (1893). Proceedings of the Annual Meeting. Society for the Promotion of Engineering Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Proceedings of the Annual Meeting. Urbana, Ill: Society for the Promotion of Engineering Education, 1893.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Proceedings of the Annual Meeting. Society for the Promotion of Engineering Education, 1893.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.