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