Vithayathil, M. K., & Edwards, M. (2016). Comfrey herbal remedy causing second-degree heart block: Do not be outfoxed by digitalis. BMJ Case Rep.
استشهاد بنمط شيكاغوVithayathil, Mathew Kurian, و Matthew Edwards. "Comfrey Herbal Remedy Causing Second-degree Heart Block: Do Not Be Outfoxed By Digitalis." BMJ Case Rep 2016.
MLA استشهادVithayathil, Mathew Kurian, و Matthew Edwards. "Comfrey Herbal Remedy Causing Second-degree Heart Block: Do Not Be Outfoxed By Digitalis." BMJ Case Rep 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.