References Helianthus

  1. ↑ Sunset Western Garden Book.
  2. ↑ Helianthus.
  3. ↑ Shorter Oxford English Dictionary, 6th ed. United Kingdom: Oxford University Press. 2007. m/s. 3804. ISBN 0-19-920687-2. 
  4. ↑ RHS A-Z Encyclopedia of Garden Plants. United Kingdom: Dorling Kindersley. 2008. m/s. 1136. ISBN 1-4053-3296-4.