| APA | Smart Define. (2013). rock drill thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rock_drill/thesaurus/narrower |
| Chicago | Smart Define. 2013. "rock drill thesaurus" https://smartdefine.org/rock_drill/thesaurus/narrower (accessed September 23, 2026). |
| Harvard | Smart Define 2013, rock drill thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rock_drill/thesaurus/narrower>. |
| MLA | Smart Define. "rock drill thesaurus" 19 May 2013. Web. 23 September 2026. <https://smartdefine.org/rock_drill/thesaurus/narrower> |