| APA | Smart Define. (1970). whom it may concern thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/whom_it_may_concern/thesaurus/antonyms |
| Chicago | Smart Define. 1970. "whom it may concern thesaurus" https://smartdefine.org/whom_it_may_concern/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 1970, whom it may concern thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/whom_it_may_concern/thesaurus/antonyms>. |
| MLA | Smart Define. "whom it may concern thesaurus" 1 January 1970. Web. 26 September 2026. <https://smartdefine.org/whom_it_may_concern/thesaurus/antonyms> |