Não informado. (1971). Kew Record of Taxonomic Literature Relating to Vascular Plants. Royal Botanic Gardens.
Chicago-referens (17:e uppl.)Não informado. Kew Record of Taxonomic Literature Relating to Vascular Plants. London: Royal Botanic Gardens, 1971.
MLA-referens (8:e uppl.)Não informado. Kew Record of Taxonomic Literature Relating to Vascular Plants. Royal Botanic Gardens, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.