Não informado. (1942). Plant science literature. U.S. Department of Agriculture, Bureau of Plant Industry.
Lua i Stíl Chicago (17ú heag.)Não informado. Plant Science Literature. Washington: U.S. Department of Agriculture, Bureau of Plant Industry, 1942.
Lua MLA (8ú heag.)Não informado. Plant Science Literature. U.S. Department of Agriculture, Bureau of Plant Industry, 1942.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.