Barber, T. W. (1915). Civil engineering types & devices: A classified and illustrated index of plant, constructions, machines, materials, means & methods ... Appleton.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Barber, Thomas Walter. Civil Engineering Types & Devices: A Classified and Illustrated Index of Plant, Constructions, Machines, Materials, Means & Methods ... New York: Appleton, 1915.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Barber, Thomas Walter. Civil Engineering Types & Devices: A Classified and Illustrated Index of Plant, Constructions, Machines, Materials, Means & Methods ... Appleton, 1915.
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