APA (7th ed.) Zitazioa
Kallhoff, A. (2011). Why democracy needs public goods. Lexington Books.
Chicago Style (17th ed.) Zitazioa
Kallhoff, Angela. Why Democracy Needs Public Goods. Lanham, Md.: Lexington Books, 2011.
MLA (9th ed.) Zitazioa
Kallhoff, Angela. Why Democracy Needs Public Goods. Lexington Books, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.