| APA | Smart Define. (-0001). interstate highway system thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/interstate_highway_system/thesaurus/broader |
| Chicago | Smart Define. -0001. "interstate highway system thesaurus" https://smartdefine.org/interstate_highway_system/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define -0001, interstate highway system thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/interstate_highway_system/thesaurus/broader>. |
| MLA | Smart Define. "interstate highway system thesaurus" 30 November -0001. Web. 26 September 2026. <https://smartdefine.org/interstate_highway_system/thesaurus/broader> |