APA (7th ed.) Zitazioa
SWISS FOUNDATION PRO SENECTUTE. (1979). OLD AGE IN SWITZERLAND. SWISS FOUNDATION PRO SENECTUTE.
Chicago Style (17th ed.) Zitazioa
SWISS FOUNDATION PRO SENECTUTE. OLD AGE IN SWITZERLAND. ZURICH (CH): SWISS FOUNDATION PRO SENECTUTE, 1979.
MLA (9th ed.) Zitazioa
SWISS FOUNDATION PRO SENECTUTE. OLD AGE IN SWITZERLAND. SWISS FOUNDATION PRO SENECTUTE, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.