| APA | Smart Define. (2013). tortoiseshell butterfly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/tortoiseshell_butterfly/thesaurus/broader |
| Chicago | Smart Define. 2013. "tortoiseshell butterfly thesaurus" https://smartdefine.org/tortoiseshell_butterfly/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define 2013, tortoiseshell butterfly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/tortoiseshell_butterfly/thesaurus/broader>. |
| MLA | Smart Define. "tortoiseshell butterfly thesaurus" 18 May 2013. Web. 26 September 2026. <https://smartdefine.org/tortoiseshell_butterfly/thesaurus/broader> |