Smith, J. A., Ashurst, H. L., Jack, S., Woodcock, A. A., & Earis, J. E. (2006). The description of cough sounds by healthcare professionals. BioMed Central.

Smith, Jaclyn A., H Louise Ashurst, Sandy Jack, Ashley A. Woodcock, και John E. Earis. The Description of Cough Sounds By Healthcare Professionals. BioMed Central, 2006.

Smith, Jaclyn A., et al. The Description of Cough Sounds By Healthcare Professionals. BioMed Central, 2006.