| APA | Smart Define. (2016). end of the world thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/end_of_the_world/thesaurus/broader |
| Chicago | Smart Define. 2016. "end of the world thesaurus" https://smartdefine.org/end_of_the_world/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define 2016, end of the world thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/end_of_the_world/thesaurus/broader>. |
| MLA | Smart Define. "end of the world thesaurus" 14 February 2016. Web. 26 September 2026. <https://smartdefine.org/end_of_the_world/thesaurus/broader> |