APA
World Health Organization, . (1993). IPCS (Environmental health criteria no - 144): principles for evaluating chemical effects on the aged population. Geneva: UNEP and World Health Organization.
Chicago
World Health Organization, . 1993. IPCS (Environmental health criteria no - 144): principles for evaluating chemical effects on the aged population. Geneva: UNEP and World Health Organization.
Harvard
World Health Organization, . (1993). IPCS (Environmental health criteria no - 144): principles for evaluating chemical effects on the aged population. Geneva: UNEP and World Health Organization.
MLA
World Health Organization, . IPCS (Environmental health criteria no - 144): principles for evaluating chemical effects on the aged population. Geneva: UNEP and World Health Organization. 1993.