| APA | Smart Define. (1970). unsustainable structures thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unsustainable_structures/thesaurus/broader |
| Chicago | Smart Define. 1970. "unsustainable structures thesaurus" https://smartdefine.org/unsustainable_structures/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define 1970, unsustainable structures thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unsustainable_structures/thesaurus/broader>. |
| MLA | Smart Define. "unsustainable structures thesaurus" 1 January 1970. Web. 26 September 2026. <https://smartdefine.org/unsustainable_structures/thesaurus/broader> |