| APA | Smart Define. (2011). ahead of its time thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ahead_of_its_time/thesaurus/antonyms |
| Chicago | Smart Define. 2011. "ahead of its time thesaurus" https://smartdefine.org/ahead_of_its_time/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2011, ahead of its time thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ahead_of_its_time/thesaurus/antonyms>. |
| MLA | Smart Define. "ahead of its time thesaurus" 24 May 2011. Web. 26 September 2026. <https://smartdefine.org/ahead_of_its_time/thesaurus/antonyms> |