| APA | Smart Define. (2013). singular form thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/singular_form/thesaurus/antonyms |
| Chicago | Smart Define. 2013. "singular form thesaurus" https://smartdefine.org/singular_form/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2013, singular form thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/singular_form/thesaurus/antonyms>. |
| MLA | Smart Define. "singular form thesaurus" 28 June 2013. Web. 25 September 2026. <https://smartdefine.org/singular_form/thesaurus/antonyms> |