| APA | Smart Define. (2013). astronomical instruments thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/astronomical_instruments/thesaurus/related |
| Chicago | Smart Define. 2013. "astronomical instruments thesaurus" https://smartdefine.org/astronomical_instruments/thesaurus/related (accessed September 25, 2026). |
| Harvard | Smart Define 2013, astronomical instruments thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/astronomical_instruments/thesaurus/related>. |
| MLA | Smart Define. "astronomical instruments thesaurus" 18 May 2013. Web. 25 September 2026. <https://smartdefine.org/astronomical_instruments/thesaurus/related> |