| APA | Smart Define. (2011). the great unknown thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/the_great_unknown/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "the great unknown thesaurus" https://smartdefine.org/the_great_unknown/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2011, the great unknown thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/the_great_unknown/thesaurus/synonyms>. |
| MLA | Smart Define. "the great unknown thesaurus" 23 May 2011. Web. 21 September 2026. <https://smartdefine.org/the_great_unknown/thesaurus/synonyms> |