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