| APA | Smart Define. (1970). plan for the future thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/plan_for_the_future/thesaurus/antonyms |
| Chicago | Smart Define. 1970. "plan for the future thesaurus" https://smartdefine.org/plan_for_the_future/thesaurus/antonyms (accessed October 2, 2026). |
| Harvard | Smart Define 1970, plan for the future thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/plan_for_the_future/thesaurus/antonyms>. |
| MLA | Smart Define. "plan for the future thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/plan_for_the_future/thesaurus/antonyms> |