| APA | Smart Define. (2016). extra-national thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extra-national/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extra-national thesaurus" https://smartdefine.org/extra-national/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, extra-national thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extra-national/thesaurus/synonyms>. |
| MLA | Smart Define. "extra-national thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/extra-national/thesaurus/synonyms> |