GRAFHAM. (1982). SCR MANUAL 6TH (ED). GENERAL ELECTRIC.
Chicago Style aipamenaGRAFHAM. SCR MANUAL 6TH (ED). LONDON: GENERAL ELECTRIC, 1982.
MLA aipamenaGRAFHAM. SCR MANUAL 6TH (ED). GENERAL ELECTRIC, 1982.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.