Trötschel, H. (2011). Correspondence (letter to the editor): Don't Forget Ventilation-Perfusion Scintigraphy. Deutscher Arzte Verlag.
Trích dẫn kiểu ChicagoTrötschel, Holger. Correspondence (letter to the Editor): Don't Forget Ventilation-Perfusion Scintigraphy. Deutscher Arzte Verlag, 2011.
Trích dẫn MLATrötschel, Holger. Correspondence (letter to the Editor): Don't Forget Ventilation-Perfusion Scintigraphy. Deutscher Arzte Verlag, 2011.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.