Langman, H. R., & Ball, A. (1935). Electrical horology: A practical manual on the application of the principles and practice of electricity to horological instruments and machines for the measurement and transmission of time (3rd ed. rev. and enl.). Technical Press.
Chicago Style (17th ed.) CitationLangman, Henry R., and A. Ball. Electrical Horology: A Practical Manual on the Application of the Principles and Practice of Electricity to Horological Instruments and Machines for the Measurement and Transmission of Time. 3rd ed. rev. and enl. London: Technical Press, 1935.
MLA (8th ed.) CitationLangman, Henry R., and A. Ball. Electrical Horology: A Practical Manual on the Application of the Principles and Practice of Electricity to Horological Instruments and Machines for the Measurement and Transmission of Time. 3rd ed. rev. and enl. Technical Press, 1935.