| APA | Smart Define. (2013). concentration on thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/concentration_on/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "concentration on thesaurus" https://smartdefine.org/concentration_on/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2013, concentration on thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/concentration_on/thesaurus/synonyms>. |
| MLA | Smart Define. "concentration on thesaurus" 17 May 2013. Web. 29 September 2026. <https://smartdefine.org/concentration_on/thesaurus/synonyms> |