| APA | Smart Define. (2011). keeping in thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/keeping_in/thesaurus/antonyms |
| Chicago | Smart Define. 2011. "keeping in thesaurus" https://smartdefine.org/keeping_in/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2011, keeping in thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/keeping_in/thesaurus/antonyms>. |
| MLA | Smart Define. "keeping in thesaurus" 21 May 2011. Web. 25 September 2026. <https://smartdefine.org/keeping_in/thesaurus/antonyms> |