| APA | Smart Define. (1970). regular publication thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/regular_publication/thesaurus/narrower |
| Chicago | Smart Define. 1970. "regular publication thesaurus" https://smartdefine.org/regular_publication/thesaurus/narrower (accessed September 22, 2026). |
| Harvard | Smart Define 1970, regular publication thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/regular_publication/thesaurus/narrower>. |
| MLA | Smart Define. "regular publication thesaurus" 1 January 1970. Web. 22 September 2026. <https://smartdefine.org/regular_publication/thesaurus/narrower> |