| APA | Smart Define. (2013). greybeard thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/greybeard/thesaurus/broader |
| Chicago | Smart Define. 2013. "greybeard thesaurus" https://smartdefine.org/greybeard/thesaurus/broader (accessed September 20, 2026). |
| Harvard | Smart Define 2013, greybeard thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/greybeard/thesaurus/broader>. |
| MLA | Smart Define. "greybeard thesaurus" 27 June 2013. Web. 20 September 2026. <https://smartdefine.org/greybeard/thesaurus/broader> |