(1975). Italia telecom 1975. Geneve: Geneve.
Chicago Style aipamenaItalia Telecom 1975. Geneve: Geneve, 1975.
MLA aipamenaItalia Telecom 1975. Geneve: Geneve, 1975.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1975). Italia telecom 1975. Geneve: Geneve.
Chicago Style aipamenaItalia Telecom 1975. Geneve: Geneve, 1975.
MLA aipamenaItalia Telecom 1975. Geneve: Geneve, 1975.