APA (7th ed.) Zitazioa
Wallace, W. (1994). Regional integration: The West European experience. Brookings Institution.
Chicago Style (17th ed.) Zitazioa
Wallace, William. Regional Integration: The West European Experience. Washington: Brookings Institution, 1994.
MLA (9th ed.) Zitazioa
Wallace, William. Regional Integration: The West European Experience. Brookings Institution, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.