Bibliografi : hlm. 211-226
Bibliografi : hlm. 263
No Inv.: 119490-119492/P/Perp/09/3c~125900-125904/P/Perp/10/10c
Judul asli : "Elektrotec in Kort Bestek"
Judul asli : "Fachkunde fur Elektroberufe"
No Inv.: 1390-1414/P/Perp/92/5c~135368/SM/Perp/13/1c
Bibliografi : hlm. 164-165
No Inv.: 87153-87154/P/Perp/03/2c