APA (7th ed.) Zitazioa
Borgmann, C. (2005). Social Security, Demographics, and Risk. Springer Berlin Heidelberg. https://doi.org/10.1007/b137963
Chicago Style (17th ed.) Zitazioa
Borgmann, Christoph. Social Security, Demographics, and Risk. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b137963.
MLA (9th ed.) Zitazioa
Borgmann, Christoph. Social Security, Demographics, and Risk. Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b137963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.