Gupta. J. B. (1988). Electrical Machines. Katson Pub.
Lua i Stíl Chicago (17ú heag.)Gupta. J. B. Electrical Machines. Delhi: Katson Pub, 1988.
Lua MLA (9ú heag.)Gupta. J. B. Electrical Machines. Katson Pub, 1988.
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