APA
WHO, . (1982). Epidemiological studies on socical and medical conditions of the elderly : report on a survey. Regional office for europe WHO, Copenhagen: .
Chicago
WHO, . 1982. Epidemiological studies on socical and medical conditions of the elderly : report on a survey. Regional office for europe WHO, Copenhagen: .
Harvard
WHO, . (1982). Epidemiological studies on socical and medical conditions of the elderly : report on a survey. Regional office for europe WHO, Copenhagen: .
MLA
WHO, . Epidemiological studies on socical and medical conditions of the elderly : report on a survey. Regional office for europe WHO, Copenhagen: . 1982.