| APA | Smart Define. (1970). european organization for the safety of air navigation eurocontrol thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/european_organization_for_the_safety_of_air_navigation_eurocontrol/thesaurus/broader |
| Chicago | Smart Define. 1970. "european organization for the safety of air navigation eurocontrol thesaurus" https://smartdefine.org/european_organization_for_the_safety_of_air_navigation_eurocontrol/thesaurus/broader (accessed October 2, 2026). |
| Harvard | Smart Define 1970, european organization for the safety of air navigation eurocontrol thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/european_organization_for_the_safety_of_air_navigation_eurocontrol/thesaurus/broader>. |
| MLA | Smart Define. "european organization for the safety of air navigation eurocontrol thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/european_organization_for_the_safety_of_air_navigation_eurocontrol/thesaurus/broader> |