Great Britain. Schools Council Project Technology. (1973). Photocell applications. Hodder and Stoughton.
Dyfyniad Arddull ChicagoGreat Britain. Schools Council Project Technology. Photocell Applications. London: Hodder and Stoughton, 1973.
Dyfyniad MLAGreat Britain. Schools Council Project Technology. Photocell Applications. Hodder and Stoughton, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.