| APA | Smart Define. (2016). lethargy thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/lethargy/thesaurus/broader |
| Chicago | Smart Define. 2016. "lethargy thesaurus" https://smartdefine.org/lethargy/thesaurus/broader (accessed September 23, 2026). |
| Harvard | Smart Define 2016, lethargy thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/lethargy/thesaurus/broader>. |
| MLA | Smart Define. "lethargy thesaurus" 25 February 2016. Web. 23 September 2026. <https://smartdefine.org/lethargy/thesaurus/broader> |