| APA | Smart Define. (2011). Charles Franklin Peirce thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/charles_franklin_peirce/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "Charles Franklin Peirce thesaurus" https://smartdefine.org/charles_franklin_peirce/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2011, Charles Franklin Peirce thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/charles_franklin_peirce/thesaurus/synonyms>. |
| MLA | Smart Define. "Charles Franklin Peirce thesaurus" 26 April 2011. Web. 22 September 2026. <https://smartdefine.org/charles_franklin_peirce/thesaurus/synonyms> |