Melville, D. R. G. (1970). Electricity: Illustrated by whitecroft designs limited. Hamlyn.
Dyfyniad Arddull ChicagoMelville, D R G. Electricity: Illustrated by Whitecroft Designs Limited. London: Hamlyn, 1970.
Dyfyniad MLAMelville, D R G. Electricity: Illustrated by Whitecroft Designs Limited. Hamlyn, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.