APA
World Health Organization, . (1988). WHO psychiatric disability assessment schedule (WHO/DAS). World Health Organization, Geneva: .
Chicago
World Health Organization, . 1988. WHO psychiatric disability assessment schedule (WHO/DAS). World Health Organization, Geneva: .
Harvard
World Health Organization, . (1988). WHO psychiatric disability assessment schedule (WHO/DAS). World Health Organization, Geneva: .
MLA
World Health Organization, . WHO psychiatric disability assessment schedule (WHO/DAS). World Health Organization, Geneva: . 1988.