APA (7th ed.) Zitazioa
Barber, S. A. (2005). Welfare and the Constitution. Princeton University Press.
Chicago Style (17th ed.) Zitazioa
Barber, Sotirios A. Welfare and the Constitution. Princeton, NJ ; Woodstock: Princeton University Press, 2005.
MLA (9th ed.) Zitazioa
Barber, Sotirios A. Welfare and the Constitution. Princeton University Press, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.