APA (7th ed.) Citation

Beauchamp, K. G. (2001). History of telegraphy. Institution of Engineering and Technology. https://doi.org/10.1049/PBHT026E

Chicago Style (17th ed.) Citation

Beauchamp, K. G. History of Telegraphy. London, United Kingdom: Institution of Engineering and Technology, 2001. https://doi.org/10.1049/PBHT026E.

MLA (9th ed.) Citation

Beauchamp, K. G. History of Telegraphy. Institution of Engineering and Technology, 2001. https://doi.org/10.1049/PBHT026E.