Não informado. (1934). Highways, Bridges and Engineering Works. IPC Building and Contract Journals.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Highways, Bridges and Engineering Works. London: IPC Building and Contract Journals, 1934.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Highways, Bridges and Engineering Works. IPC Building and Contract Journals, 1934.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.