APA

National Institutes of Health (U.S.), . (19). La vejez y accidents (Aging and accidents, Spanish). [Washington, D.C: .

Chicago

National Institutes of Health (U.S.), . 19. La vejez y accidents (Aging and accidents, Spanish). [Washington, D.C: .

Harvard

National Institutes of Health (U.S.), . (19). La vejez y accidents (Aging and accidents, Spanish). [Washington, D.C: .

MLA

National Institutes of Health (U.S.), . La vejez y accidents (Aging and accidents, Spanish). [Washington, D.C: . 19.