Não informado. (2010). New Series of Plant Science Books. Chronica Botanica Company.
Chicago-referens (17:e uppl.)Não informado. New Series of Plant Science Books. Waltham, Mass: Chronica Botanica Company, 2010.
MLA-referens (8:e uppl.)Não informado. New Series of Plant Science Books. Chronica Botanica Company, 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.