| APA | Smart Define. (2011). alpha-blocker thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/alpha-blocker/thesaurus/narrower |
| Chicago | Smart Define. 2011. "alpha-blocker thesaurus" https://smartdefine.org/alpha-blocker/thesaurus/narrower (accessed September 22, 2026). |
| Harvard | Smart Define 2011, alpha-blocker thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/alpha-blocker/thesaurus/narrower>. |
| MLA | Smart Define. "alpha-blocker thesaurus" 26 April 2011. Web. 22 September 2026. <https://smartdefine.org/alpha-blocker/thesaurus/narrower> |