(1971). Telecommunication: Sector working paper. Work Bank.
Trích dẫn kiểu ChicagoTelecommunication: Sector Working Paper. Work Bank, 1971.
ציטוט MLATelecommunication: Sector Working Paper. Work Bank, 1971.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.