„NEC Financials and News“. fortune.com. Suarchyvuotas originalas 24 June 2017. Nuoroda tikrinta 16 October 2018. „NEC is #463 on the 2017 Fortune 500 list.“
„NEC Financials and News“. fortune.com. Suarchyvuotas originalas 24 June 2017. Nuoroda tikrinta 16 October 2018. „NEC is #463 on the 2017 Fortune 500 list.“