| APA | Smart Define. (2013). subject of study thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/subject_of_study/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "subject of study thesaurus" https://smartdefine.org/subject_of_study/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, subject of study thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/subject_of_study/thesaurus/synonyms>. |
| MLA | Smart Define. "subject of study thesaurus" 18 May 2013. Web. 21 September 2026. <https://smartdefine.org/subject_of_study/thesaurus/synonyms> |