| APA | Smart Define. (2013). on your guard thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/on_your_guard/thesaurus/antonyms |
| Chicago | Smart Define. 2013. "on your guard thesaurus" https://smartdefine.org/on_your_guard/thesaurus/antonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2013, on your guard thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/on_your_guard/thesaurus/antonyms>. |
| MLA | Smart Define. "on your guard thesaurus" 28 June 2013. Web. 30 September 2026. <https://smartdefine.org/on_your_guard/thesaurus/antonyms> |