Pencoyd Iron Works. (1885). Wrought iron and steel in construction: Convenient rules, formulae, and tables for the strength of wrought iron shapes used as beams, struts, shafts, etc (2d ed., rev. and enl.). J. Wiley.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pencoyd Iron Works. Wrought Iron and Steel in Construction: Convenient Rules, Formulae, and Tables for the Strength of Wrought Iron Shapes Used as Beams, Struts, Shafts, Etc. 2d ed., rev. and enl. New York: J. Wiley, 1885.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pencoyd Iron Works. Wrought Iron and Steel in Construction: Convenient Rules, Formulae, and Tables for the Strength of Wrought Iron Shapes Used as Beams, Struts, Shafts, Etc. 2d ed., rev. and enl. J. Wiley, 1885.
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