| APA | Smart Define. (2011). mourning cloak butterfly thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/mourning_cloak_butterfly/thesaurus/broader |
| Chicago | Smart Define. 2011. "mourning cloak butterfly thesaurus" https://smartdefine.org/mourning_cloak_butterfly/thesaurus/broader (accessed September 30, 2026). |
| Harvard | Smart Define 2011, mourning cloak butterfly thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/mourning_cloak_butterfly/thesaurus/broader>. |
| MLA | Smart Define. "mourning cloak butterfly thesaurus" 26 April 2011. Web. 30 September 2026. <https://smartdefine.org/mourning_cloak_butterfly/thesaurus/broader> |