Hill, A. H., & Worsdell, W. (1941). Index londinensis: To the illustrations of flowering plants, ferns and fern allies. Oxford at the Claredon Press.
Lua i Stíl Chicago (17ú heag.)Hill, Arthur H., agus W.C Worsdell. Index Londinensis: To the Illustrations of Flowering Plants, Ferns and Fern Allies. Koenigstein: Oxford at the Claredon Press, 1941.
Lua MLA (9ú heag.)Hill, Arthur H., agus W.C Worsdell. Index Londinensis: To the Illustrations of Flowering Plants, Ferns and Fern Allies. Oxford at the Claredon Press, 1941.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.