Westover, O. A. (1907). The scientific steel worker: A practical manual for steel workers and blacksmiths, the art of working steel thoroughly explained : also steel working receipts and mechanical tables for making rings of all sizes of iron, steel and angle iron ([2nd ed.].). Wheeling News Litho. Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Westover, Ozro A. The Scientific Steel Worker: A Practical Manual for Steel Workers and Blacksmiths, the Art of Working Steel Thoroughly Explained : Also Steel Working Receipts and Mechanical Tables for Making Rings of All Sizes of Iron, Steel and Angle Iron. [2nd ed.]. [Wheeling, W. Va.: Wheeling News Litho. Co., 1907.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Westover, Ozro A. The Scientific Steel Worker: A Practical Manual for Steel Workers and Blacksmiths, the Art of Working Steel Thoroughly Explained : Also Steel Working Receipts and Mechanical Tables for Making Rings of All Sizes of Iron, Steel and Angle Iron. [2nd ed.]. Wheeling News Litho. Co., 1907.