Colver, A. F. (1990). Health surveillance of preschool children: Four years' experience.
Citação norma ChicagoColver, A F. Health Surveillance of Preschool Children: Four Years' Experience. 1990.
MLA引文Colver, A F. Health Surveillance of Preschool Children: Four Years' Experience. 1990.
警告：這些引文格式不一定是100％准確.