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APA-viiteWorld Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment. (1990). Global estimates for health situation assessment and projections 1990. World Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment.
Chicago-tyylinen lähdeviittausWorld Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment. Global Estimates for Health Situation Assessment and Projections 1990. Geneva: World Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment, 1990.
MLA-viiteWorld Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment. Global Estimates for Health Situation Assessment and Projections 1990. World Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment, 1990.
Harvard-tyylinen lähdeviittausWorld Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment. 1990. Global estimates for health situation assessment and projections 1990. Geneva: World Health Organization. Division of Epidemiological Surveillance and Health Situation and Trend Assessment.