- ↑ 1.0 1.1
"Parmentiera cereifera". IUCN Red List of Threatened Species. Version 2012.2. International Union for Conservation of Nature. 1998. Ginkuhà 24 Oktubre 2012.
- ↑ Lamiales of North America Update, 2011
- ↑ database, The PLANTS Database, 2000
- ↑ database, The PLANTS Database, 1996
- ↑ 5.0 5.1 Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2014). "Species 2000 & ITIS Catalogue of Life: 2014 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 26 Mayo 2014.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ (Canada);http://siit.conabio.gob.mx (Mexico) ITIS Regional: The Integrated Taxonomic Information System
