Keller, K. J. Electrical safety code manual: A plain language guide to National electrical code, OSHA, and NFPA 70E.
Čikaški stil citiranja (17. izdanje)Keller, K. J. Electrical Safety Code Manual: A Plain Language Guide to National Electrical Code, OSHA, and NFPA 70E.
MLA način citiranja (8. izdanje)Keller, K. J. Electrical Safety Code Manual: A Plain Language Guide to National Electrical Code, OSHA, and NFPA 70E.
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