| APA | Smart Define. (2013). cobalt ultramarine thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/cobalt_ultramarine/thesaurus/broader |
| Chicago | Smart Define. 2013. "cobalt ultramarine thesaurus" https://smartdefine.org/cobalt_ultramarine/thesaurus/broader (accessed September 30, 2026). |
| Harvard | Smart Define 2013, cobalt ultramarine thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/cobalt_ultramarine/thesaurus/broader>. |
| MLA | Smart Define. "cobalt ultramarine thesaurus" 19 May 2013. Web. 30 September 2026. <https://smartdefine.org/cobalt_ultramarine/thesaurus/broader> |