Lawrence, G. H. (1951). Taxonomy of vascular plants. Macmillan Co.
Lua i Stíl Chicago (17ú heag.)Lawrence, George H. Taxonomy of Vascular Plants. New York: Macmillan Co, 1951.
Lua MLA (9ú heag.)Lawrence, George H. Taxonomy of Vascular Plants. Macmillan Co, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.