APA
World Health Organization, . (1983). IPCS (Environmental health criteria no - 027): guidelines on studies in environmental epidemiology. Geneva: UNEP and World Health Organization.
Chicago
World Health Organization, . 1983. IPCS (Environmental health criteria no - 027): guidelines on studies in environmental epidemiology. Geneva: UNEP and World Health Organization.
Harvard
World Health Organization, . (1983). IPCS (Environmental health criteria no - 027): guidelines on studies in environmental epidemiology. Geneva: UNEP and World Health Organization.
MLA
World Health Organization, . IPCS (Environmental health criteria no - 027): guidelines on studies in environmental epidemiology. Geneva: UNEP and World Health Organization. 1983.