APA (7th ed.) Zitazioa
GEORGE, M. (1995). CONTRACTS: VOLUNTARY SECTOR. CONTRACT KILLER.
Chicago Style (17th ed.) Zitazioa
GEORGE, M. CONTRACTS: VOLUNTARY SECTOR. CONTRACT KILLER. 1995.
MLA (9th ed.) Zitazioa
GEORGE, M. CONTRACTS: VOLUNTARY SECTOR. CONTRACT KILLER. 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.