Davey, S. (2002). State of the world's vaccines and immunization. World Health Organization.
芝加哥风格引文Davey, Sheila. State of the World's Vaccines and Immunization. Geneva: World Health Organization, 2002.
MLA引文Davey, Sheila. State of the World's Vaccines and Immunization. World Health Organization, 2002.
警告：这些引文格式不一定是100％准确.