APA引文

Densler, J. F. (1977). Umbilical hernia in infants and children. National Medical Association.

Citação norma Chicago

Densler, J. F. Umbilical Hernia in Infants and Children. National Medical Association, 1977.

MLA引文

Densler, J. F. Umbilical Hernia in Infants and Children. National Medical Association, 1977.

警告：這些引文格式不一定是100％准確.