| APA | Smart Define. (2013). not practical thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/not_practical/thesaurus/antonyms |
| Chicago | Smart Define. 2013. "not practical thesaurus" https://smartdefine.org/not_practical/thesaurus/antonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, not practical thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/not_practical/thesaurus/antonyms>. |
| MLA | Smart Define. "not practical thesaurus" 19 May 2013. Web. 21 September 2026. <https://smartdefine.org/not_practical/thesaurus/antonyms> |