APA (7th ed.) Zitazioa
Owen, W. (1956). The Metropolitan Transportation Problem. Brookings Institution.
Chicago Style (17th ed.) Zitazioa
Owen, Wilfred. The Metropolitan Transportation Problem. Washington, EUA: Brookings Institution, 1956.
MLA (9th ed.) Zitazioa
Owen, Wilfred. The Metropolitan Transportation Problem. Brookings Institution, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.