| APA | Smart Define. (2011). four horsemen thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/four_horsemen/thesaurus/broader |
| Chicago | Smart Define. 2011. "four horsemen thesaurus" https://smartdefine.org/four_horsemen/thesaurus/broader (accessed September 22, 2026). |
| Harvard | Smart Define 2011, four horsemen thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/four_horsemen/thesaurus/broader>. |
| MLA | Smart Define. "four horsemen thesaurus" 26 April 2011. Web. 22 September 2026. <https://smartdefine.org/four_horsemen/thesaurus/broader> |