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.
芝加哥风格引文Graham, Wendy, William Brass, 与 Robert W. Snow. Indirect Estimation of Maternal Mortality: The Sisterhood Method. London: Centre for Population Studies, London School of Hygiene and Tropical Medicine, 1988.
MLA引文Graham, Wendy, et al. Indirect Estimation of Maternal Mortality: The Sisterhood Method. Centre for Population Studies, London School of Hygiene and Tropical Medicine, 1988.
警告：这些引文格式不一定是100％准确.