APA (7th ed.) Zitazioa

Work, Aging and Retirement. Oxford University Press.

Chicago Style (17th ed.) Zitazioa

Work, Aging and Retirement. Oxford University Press.

MLA (9th ed.) Zitazioa

Work, Aging and Retirement. Oxford University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.