| APA | Smart Define. (-0001). curschmann's spirals thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/curschmann%27s_spirals/thesaurus/broader |
| Chicago | Smart Define. -0001. "curschmann's spirals thesaurus" https://smartdefine.org/curschmann%27s_spirals/thesaurus/broader (accessed September 24, 2026). |
| Harvard | Smart Define -0001, curschmann's spirals thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/curschmann%27s_spirals/thesaurus/broader>. |
| MLA | Smart Define. "curschmann's spirals thesaurus" 30 November -0001. Web. 24 September 2026. <https://smartdefine.org/curschmann%27s_spirals/thesaurus/broader> |