Greenwood, A. (1994). Vacuum switchgear. Institution of Engineering and Technology. https://doi.org/10.1049/PBPO018E
Chicago-viite (17. p.)Greenwood, Allan. Vacuum Switchgear. London, United Kingdom: Institution of Engineering and Technology, 1994. https://doi.org/10.1049/PBPO018E.
MLA-viite (9. p.)Greenwood, Allan. Vacuum Switchgear. Institution of Engineering and Technology, 1994. https://doi.org/10.1049/PBPO018E.
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