| APA | Smart Define. (2011). crack the books thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/crack_the_books/thesaurus/antonyms |
| Chicago | Smart Define. 2011. "crack the books thesaurus" https://smartdefine.org/crack_the_books/thesaurus/antonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2011, crack the books thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/crack_the_books/thesaurus/antonyms>. |
| MLA | Smart Define. "crack the books thesaurus" 24 May 2011. Web. 30 September 2026. <https://smartdefine.org/crack_the_books/thesaurus/antonyms> |