Não informado. University of Iowa studies in engineering. University of Iowa, College of Engineering.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. University of Iowa Studies in Engineering. Iowa City, Iowa: University of Iowa, College of Engineering.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. University of Iowa Studies in Engineering. University of Iowa, College of Engineering.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.