| APA | Smart Define. (-0001). birkie thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/birkie/thesaurus/antonyms |
| Chicago | Smart Define. -0001. "birkie thesaurus" https://smartdefine.org/birkie/thesaurus/antonyms (accessed October 1, 2026). |
| Harvard | Smart Define -0001, birkie thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/birkie/thesaurus/antonyms>. |
| MLA | Smart Define. "birkie thesaurus" 30 November -0001. Web. 1 October 2026. <https://smartdefine.org/birkie/thesaurus/antonyms> |