Brown, C. (1990). Public sector economics (4th.). Basil Black Well.
Chicago Style aipamenaBrown, C. Public Sector Economics. 4th. Oxford: Basil Black Well, 1990.
MLA aipamenaBrown, C. Public Sector Economics. 4th. Basil Black Well, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.