| APA | Smart Define. (2011). royal air force thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/royal_air_force/thesaurus/broader |
| Chicago | Smart Define. 2011. "royal air force thesaurus" https://smartdefine.org/royal_air_force/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define 2011, royal air force thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/royal_air_force/thesaurus/broader>. |
| MLA | Smart Define. "royal air force thesaurus" 26 April 2011. Web. 26 September 2026. <https://smartdefine.org/royal_air_force/thesaurus/broader> |