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APASmart Define. (2013). pre-existing thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/pre-existing/thesaurus/synonyms
ChicagoSmart Define. 2013. "pre-existing thesaurus" https://smartdefine.org/pre-existing/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, pre-existing thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/pre-existing/thesaurus/synonyms>.
MLASmart Define. "pre-existing thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/pre-existing/thesaurus/synonyms>