Gruezo, W. S., & Denford, K. E. Taxonomy of Arnica L. subgenus ChamissonisMaguire (Asteraceae)1. Asia life sciences :the international journal of life sciences..
Citazione stile Chigago Style (17a edizione)Gruezo, William Sm, e Keith E. Denford. "Taxonomy of Arnica L. Subgenus ChamissonisMaguire (Asteraceae)1." Asia Life Sciences :the International Journal of Life Sciences. .
Citatione MLA (9a ed.)Gruezo, William Sm, e Keith E. Denford. "Taxonomy of Arnica L. Subgenus ChamissonisMaguire (Asteraceae)1." Asia Life Sciences :the International Journal of Life Sciences., .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.