| APA | Smart Define. (-0001). Krukenberg's spindle thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/krukenberg%27s_spindle/thesaurus/broader |
| Chicago | Smart Define. -0001. "Krukenberg's spindle thesaurus" https://smartdefine.org/krukenberg%27s_spindle/thesaurus/broader (accessed September 26, 2026). |
| Harvard | Smart Define -0001, Krukenberg's spindle thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/krukenberg%27s_spindle/thesaurus/broader>. |
| MLA | Smart Define. "Krukenberg's spindle thesaurus" 30 November -0001. Web. 26 September 2026. <https://smartdefine.org/krukenberg%27s_spindle/thesaurus/broader> |