Kraal, E, G.(1996).Reed's Marine Engineering Series Vol.7 : Advanced Electrotechnology for Engineers (Ed. 2).United Kingdom:Penerbit Thomas Reed Publications.
Gaya MLA
Kraal, Edmund, G.R.."Reed's Marine Engineering Series Vol.7 : Advanced Electrotechnology for Engineers".Ed. 2United Kingdom:Penerbit Thomas Reed Publications,1996.Text.