Henry Wiggin & Company. (1950). Wiggin electrical handbook (4th ed.). H. Wiggin.
Lua i Stíl Chicago (17ú heag.)Henry Wiggin & Company. Wiggin Electrical Handbook. 4th ed. Birmingham [England]: H. Wiggin, 1950.
Lua MLA (8ú heag.)Henry Wiggin & Company. Wiggin Electrical Handbook. 4th ed. H. Wiggin, 1950.
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