Graham, W., Brass, W., & Snow, R. W. (1988). Indirect estimation of maternal mortality: The sisterhood method. Centre for Population Studies, London School of Hygiene and Tropical Medicine.
Citace podle Chicago (17th ed.)Graham, Wendy, William Brass, a Robert W. Snow. Indirect Estimation of Maternal Mortality: The Sisterhood Method. London: Centre for Population Studies, London School of Hygiene and Tropical Medicine, 1988.
Citace podle MLA (9th ed.)Graham, Wendy, et al. Indirect Estimation of Maternal Mortality: The Sisterhood Method. Centre for Population Studies, London School of Hygiene and Tropical Medicine, 1988.
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