| APA | Smart Define. (2013). dug-out thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/dug-out/thesaurus/narrower |
| Chicago | Smart Define. 2013. "dug-out thesaurus" https://smartdefine.org/dug-out/thesaurus/narrower (accessed September 20, 2026). |
| Harvard | Smart Define 2013, dug-out thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/dug-out/thesaurus/narrower>. |
| MLA | Smart Define. "dug-out thesaurus" 18 May 2013. Web. 20 September 2026. <https://smartdefine.org/dug-out/thesaurus/narrower> |