| APA | Smart Define. (-0001). event horizon thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/event_horizon/thesaurus/broader |
| Chicago | Smart Define. -0001. "event horizon thesaurus" https://smartdefine.org/event_horizon/thesaurus/broader (accessed September 25, 2026). |
| Harvard | Smart Define -0001, event horizon thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/event_horizon/thesaurus/broader>. |
| MLA | Smart Define. "event horizon thesaurus" 30 November -0001. Web. 25 September 2026. <https://smartdefine.org/event_horizon/thesaurus/broader> |