Não informado. (1960). NEC Research and Development. Nippon Electric Company.
Chicago (17e ed.) BronvermeldingNão informado. NEC Research and Development. Tokyo: Nippon Electric Company, 1960.
MLA (8e ed.) BronvermeldingNão informado. NEC Research and Development. Nippon Electric Company, 1960.
Let op: Deze citaties zijn niet altijd 100% accuraat.