| APA | Smart Define. (-0001). sub-district thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sub-district/thesaurus/narrower |
| Chicago | Smart Define. -0001. "sub-district thesaurus" https://smartdefine.org/sub-district/thesaurus/narrower (accessed September 23, 2026). |
| Harvard | Smart Define -0001, sub-district thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sub-district/thesaurus/narrower>. |
| MLA | Smart Define. "sub-district thesaurus" 30 November -0001. Web. 23 September 2026. <https://smartdefine.org/sub-district/thesaurus/narrower> |