APA
Organización Mundial de la Salud, .Early detection of health impairment in occupational exposure to health hazard. Geneva: .
Chicago
Organización Mundial de la Salud, .Early detection of health impairment in occupational exposure to health hazard. Geneva: .
Harvard
Organización Mundial de la Salud, .Early detection of health impairment in occupational exposure to health hazard. Geneva: .
MLA
Organización Mundial de la Salud, .Geneva: . .