World Health Organization. (2000). Environmental health criteria 214: Human exposure assessment. World health Organization.
Cita Chicago Style (17a ed.)World Health Organization. Environmental Health Criteria 214: Human Exposure Assessment. Geneva: World health Organization, 2000.
Cita MLA (8a ed.)World Health Organization. Environmental Health Criteria 214: Human Exposure Assessment. World health Organization, 2000.
Precaución: Estas citas no son 100% exactas.