| APA | Smart Define. (2011). u.s. national library of medicine thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/u.s._national_library_of_medicine/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "u.s. national library of medicine thesaurus" https://smartdefine.org/u.s._national_library_of_medicine/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2011, u.s. national library of medicine thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/u.s._national_library_of_medicine/thesaurus/synonyms>. |
| MLA | Smart Define. "u.s. national library of medicine thesaurus" 26 April 2011. Web. 1 October 2026. <https://smartdefine.org/u.s._national_library_of_medicine/thesaurus/synonyms> |