Croft, T. W., & Hall, G. (1939). Practical electric illumination and signal-wiring methods (3rd ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)Croft, Terrell Williams, y George Hall. Practical Electric Illumination and Signal-wiring Methods. 3rd ed. New York: McGraw-Hill, 1939.
Cita MLA (9a ed.)Croft, Terrell Williams, y George Hall. Practical Electric Illumination and Signal-wiring Methods. 3rd ed. McGraw-Hill, 1939.
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