APA引文

Davies, D., & Smith, W. H. (1975). Letter: Pleural effusion.

Citação norma Chicago

Davies, D., and W H. Smith. Letter: Pleural Effusion. 1975.

MLA引文

Davies, D., and W H. Smith. Letter: Pleural Effusion. 1975.

警告：這些引文格式不一定是100％准確.