| APA | Smart Define. (2011). bread-and-butter letter thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/bread-and-butter_letter/thesaurus/broader |
| Chicago | Smart Define. 2011. "bread-and-butter letter thesaurus" https://smartdefine.org/bread-and-butter_letter/thesaurus/broader (accessed September 29, 2026). |
| Harvard | Smart Define 2011, bread-and-butter letter thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/bread-and-butter_letter/thesaurus/broader>. |
| MLA | Smart Define. "bread-and-butter letter thesaurus" 29 May 2011. Web. 29 September 2026. <https://smartdefine.org/bread-and-butter_letter/thesaurus/broader> |