Koester, F. (1909). Hydroelectric developments and engineering: A practical and theoretical treatise on the development, design, construction, equipment and operation of hydroelectric transmission plants. D. Van Nostrand Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Koester, Frank. Hydroelectric Developments and Engineering: A Practical and Theoretical Treatise on the Development, Design, Construction, Equipment and Operation of Hydroelectric Transmission Plants. New York: D. Van Nostrand Co., 1909.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Koester, Frank. Hydroelectric Developments and Engineering: A Practical and Theoretical Treatise on the Development, Design, Construction, Equipment and Operation of Hydroelectric Transmission Plants. D. Van Nostrand Co., 1909.
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