| APA | Smart Define. (-0001). area of study thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/area_of_study/thesaurus/narrower |
| Chicago | Smart Define. -0001. "area of study thesaurus" https://smartdefine.org/area_of_study/thesaurus/narrower (accessed September 22, 2026). |
| Harvard | Smart Define -0001, area of study thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/area_of_study/thesaurus/narrower>. |
| MLA | Smart Define. "area of study thesaurus" 30 November -0001. Web. 22 September 2026. <https://smartdefine.org/area_of_study/thesaurus/narrower> |