Humphreys, A. C. (1912). Lecture notes on some of the business features of engineering practice (Rev. and enl.). Department of Economics of Engineering, Stevens Institute of Technology.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Humphreys, Alexander Crombie. Lecture Notes on Some of the Business Features of Engineering Practice. Rev. and enl. Hoboken, N.J.: Department of Economics of Engineering, Stevens Institute of Technology, 1912.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Humphreys, Alexander Crombie. Lecture Notes on Some of the Business Features of Engineering Practice. Rev. and enl. Department of Economics of Engineering, Stevens Institute of Technology, 1912.
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