APA (7th ed.) Zitazioa
Sen, A. (1999). Development as freedom. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Sen, Amartya. Development as Freedom. Oxford: Oxford University Press, 1999.
MLA (9th ed.) Zitazioa
Sen, Amartya. Development as Freedom. Oxford University Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.