| APA | Smart Define. (2011). the eighth wonder of the world thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/the_eighth_wonder_of_the_world/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "the eighth wonder of the world thesaurus" https://smartdefine.org/the_eighth_wonder_of_the_world/thesaurus/synonyms (accessed October 2, 2026). |
| Harvard | Smart Define 2011, the eighth wonder of the world thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/the_eighth_wonder_of_the_world/thesaurus/synonyms>. |
| MLA | Smart Define. "the eighth wonder of the world thesaurus" 24 May 2011. Web. 2 October 2026. <https://smartdefine.org/the_eighth_wonder_of_the_world/thesaurus/synonyms> |