| APA | Smart Define. (2013). butter mountain thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/butter_mountain/thesaurus/antonyms |
| Chicago | Smart Define. 2013. "butter mountain thesaurus" https://smartdefine.org/butter_mountain/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2013, butter mountain thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/butter_mountain/thesaurus/antonyms>. |
| MLA | Smart Define. "butter mountain thesaurus" 18 May 2013. Web. 26 September 2026. <https://smartdefine.org/butter_mountain/thesaurus/antonyms> |