International Union for Conservation of Nature. Retrieved 18 January 2012. Linnæus, Carl (1758). Systema naturæ per regna tria naturæ, secundum classes, ordines
International Union for Conservation of Nature. 2014. अभिगमन तिथि 2014-07-29. Linnæus, Carl (1758). Systema naturæ per regna tria naturæ, secundum classes, ordines
International Union for Conservation of Nature. 2014. अभिगमन तिथि 2014-07-29. Linnæus, Carl (1758). Systema naturæ per regna tria naturæ, secundum classes, ordines
International Union for Conservation of Nature. Retrieved 2014-07-07. Linnæus, Carl (1758). Systema naturæ per regna tria naturæ, secundum classes, ordines