APA
World Health Organization, . (1999). IPCS (Environmental health criteria no - 212): principles and methods for assessing allergic hypersentilization associated with exposure to chemicals. Geneva: UNEP and World Health Organization.
Chicago
World Health Organization, . 1999. IPCS (Environmental health criteria no - 212): principles and methods for assessing allergic hypersentilization associated with exposure to chemicals. Geneva: UNEP and World Health Organization.
Harvard
World Health Organization, . (1999). IPCS (Environmental health criteria no - 212): principles and methods for assessing allergic hypersentilization associated with exposure to chemicals. Geneva: UNEP and World Health Organization.
MLA
World Health Organization, . IPCS (Environmental health criteria no - 212): principles and methods for assessing allergic hypersentilization associated with exposure to chemicals. Geneva: UNEP and World Health Organization. 1999.