APA-referens (7:e uppl.)

Härtel, A., Peters, M., & Kostev, K. (2022). Prevalence of Spirometry Testing among Patients with Asthma and COPD in German General Practices. Philipps-Universität Marburg. https://doi.org/10.3390/healthcare10122570

Chicago-referens (17:e uppl.)

Härtel, Annika, Maximilian Peters, och Karel Kostev. Prevalence of Spirometry Testing Among Patients with Asthma and COPD in German General Practices. Philipps-Universität Marburg, 2022. https://doi.org/10.3390/healthcare10122570.

MLA-referens (9:e uppl.)

Härtel, Annika, et al. Prevalence of Spirometry Testing Among Patients with Asthma and COPD in German General Practices. Philipps-Universität Marburg, 2022. https://doi.org/10.3390/healthcare10122570.