| APA | Smart Define. (2013). middle-ager thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/middle-ager/thesaurus/antonyms |
| Chicago | Smart Define. 2013. "middle-ager thesaurus" https://smartdefine.org/middle-ager/thesaurus/antonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2013, middle-ager thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/middle-ager/thesaurus/antonyms>. |
| MLA | Smart Define. "middle-ager thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/middle-ager/thesaurus/antonyms> |