McPartland, J. F., McPartland, J. M., & McPartland, G. I. (1981). National Electrical Code Handbook (7a. ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)McPartland, Joseph F., John M. McPartland, agus Guy I. McPartland. National Electrical Code Handbook. 7a. ed. Nueva York: McGraw-Hill, 1981.
Lua MLA (9ú heag.)McPartland, Joseph F., et al. National Electrical Code Handbook. 7a. ed. McGraw-Hill, 1981.
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