| APA | Smart Define. (2011). friedrich august kekule thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/friedrich_august_kekule/thesaurus/broader |
| Chicago | Smart Define. 2011. "friedrich august kekule thesaurus" https://smartdefine.org/friedrich_august_kekule/thesaurus/broader (accessed September 28, 2026). |
| Harvard | Smart Define 2011, friedrich august kekule thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/friedrich_august_kekule/thesaurus/broader>. |
| MLA | Smart Define. "friedrich august kekule thesaurus" 26 April 2011. Web. 28 September 2026. <https://smartdefine.org/friedrich_august_kekule/thesaurus/broader> |