APA引文

Masters, N. (2009). Croup calculator: Frequently asked questions. London J Prim Care (Abingdon).

Citação norma Chicago

Masters, Nigel. "Croup Calculator: Frequently Asked Questions." London J Prim Care (Abingdon) 2009.

MLA引文

Masters, Nigel. "Croup Calculator: Frequently Asked Questions." London J Prim Care (Abingdon) 2009.

警告：這些引文格式不一定是100％准確.