Hughes , E. . .. (1969). Electrical technology (4th ed.). Longmans green.
Chicago-čujuhus (17. p.)Hughes , Edward. Electrical Technology. 4th ed. London: Longmans green, 1969.
MLA-čujuhus (9. p.)Hughes , Edward. Electrical Technology. 4th ed. Longmans green, 1969.
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