| APA | Smart Define. (-0001). closed ecological system thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/closed_ecological_system/thesaurus/broader |
| Chicago | Smart Define. -0001. "closed ecological system thesaurus" https://smartdefine.org/closed_ecological_system/thesaurus/broader (accessed September 21, 2026). |
| Harvard | Smart Define -0001, closed ecological system thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/closed_ecological_system/thesaurus/broader>. |
| MLA | Smart Define. "closed ecological system thesaurus" 30 November -0001. Web. 21 September 2026. <https://smartdefine.org/closed_ecological_system/thesaurus/broader> |