APA (7th ed.) Zitazioa
Schwab, L. (1990). Eye care in developing nations (2nd ed.). Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Schwab, Larry. Eye Care in Developing Nations. 2nd ed. New York: Oxford University Press, 1990.
MLA (9th ed.) Zitazioa
Schwab, Larry. Eye Care in Developing Nations. 2nd ed. Oxford University Press, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.