| APA | Smart Define. (2013). humbler classes thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/humbler_classes/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "humbler classes thesaurus" https://smartdefine.org/humbler_classes/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2013, humbler classes thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/humbler_classes/thesaurus/synonyms>. |
| MLA | Smart Define. "humbler classes thesaurus" 19 May 2013. Web. 27 September 2026. <https://smartdefine.org/humbler_classes/thesaurus/synonyms> |