Muller, R. (1921). Hydroelectrical engineering: A book for hydraulic and electrical engineers, students and others interested in the development of hydroelectric power systems. G.E. Stechert & Co.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Muller, Richard. Hydroelectrical Engineering: A Book for Hydraulic and Electrical Engineers, Students and Others Interested in the Development of Hydroelectric Power Systems. New York: G.E. Stechert & Co, 1921.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Muller, Richard. Hydroelectrical Engineering: A Book for Hydraulic and Electrical Engineers, Students and Others Interested in the Development of Hydroelectric Power Systems. G.E. Stechert & Co, 1921.
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