APA
World Health Organization U. N. E. P. &. I., . (1999). Principles for the assessment of risk to human health from exposure to chemicals. WHO, Geneva: .
Chicago
World Health Organization United Nations Environment Programme & ILO, . 1999. Principles for the assessment of risk to human health from exposure to chemicals. WHO, Geneva: .
Harvard
World Health Organization U. N. E. P. &. I., . (1999). Principles for the assessment of risk to human health from exposure to chemicals. WHO, Geneva: .
MLA
World Health Organization United Nations Environment Programme & ILO, . Principles for the assessment of risk to human health from exposure to chemicals. WHO, Geneva: . 1999.