| APA | Smart Define. (2011). by natural law thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/by_natural_law/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "by natural law thesaurus" https://smartdefine.org/by_natural_law/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2011, by natural law thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/by_natural_law/thesaurus/synonyms>. |
| MLA | Smart Define. "by natural law thesaurus" 21 May 2011. Web. 30 September 2026. <https://smartdefine.org/by_natural_law/thesaurus/synonyms> |