Tài liệu tham khảo WikiPedia: Cỏ_bạc_đầu http://www.ipni.org/ipni/idPlantNameSearch.do?id=3... http://www.theplantlist.org/tpl1.1/record/kew-2513... http://suckhoedoisong.vn/co-bac-dau-khu-phong-giai...