| APA | Smart Define. (1970). European Organization for the Safety of Air Navigation Eurocontrol thesaurus. Retrieved September 26, 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 September 26, 2026). |
| Harvard | Smart Define 1970, European Organization for the Safety of Air Navigation Eurocontrol thesaurus, Smart Define, viewed 26 September, 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. 26 September 2026. <https://smartdefine.org/european_organization_for_the_safety_of_air_navigation_eurocontrol/thesaurus/broader> |