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
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Härtel, Annika, Maximilian Peters, و 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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.