(2002). Vacines and Biologicals Who vaccine preventable diasease monitoring system 2002 global summary.
芝加哥风格引文Vacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. 2002.
MLA引文Vacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. 2002.
警告：这些引文格式不一定是100％准确.