| APA | Smart Define. (1970). as fat as butter thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/as_fat_as_butter/thesaurus/antonyms |
| Chicago | Smart Define. 1970. "as fat as butter thesaurus" https://smartdefine.org/as_fat_as_butter/thesaurus/antonyms (accessed September 29, 2026). |
| Harvard | Smart Define 1970, as fat as butter thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/as_fat_as_butter/thesaurus/antonyms>. |
| MLA | Smart Define. "as fat as butter thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/as_fat_as_butter/thesaurus/antonyms> |