APA (7th ed.) Zitazioa

Advance Care Planning: Health Care Directives. National Institute on Aging.

Chicago Style (17th ed.) Zitazioa

Advance Care Planning: Health Care Directives. National Institute on Aging.

MLA (9th ed.) Zitazioa

Advance Care Planning: Health Care Directives. National Institute on Aging.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.