Não informado. (1923). Minnesota Studies in Plant Science. University of Minnesota.
Lua i Stíl Chicago (17ú heag.)Não informado. Minnesota Studies in Plant Science. Minneapolis, Minn: University of Minnesota, 1923.
Lua MLA (8ú heag.)Não informado. Minnesota Studies in Plant Science. University of Minnesota, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.