Hewitson, L. G., Brown, M., & Balakrishnan, R. (2005). Practical power systems protection. Newnes.
Lua i Stíl Chicago (17ú heag.)Hewitson, L. G., Mark Brown, agus Ramesh Balakrishnan. Practical Power Systems Protection. Oxford: Newnes, 2005.
Lua MLA (8ú heag.)Hewitson, L. G., et al. Practical Power Systems Protection. Newnes, 2005.
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