| APA | Smart Define. (1970). hydrogeologic thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/hydrogeologic/thesaurus/related |
| Chicago | Smart Define. 1970. "hydrogeologic thesaurus" https://smartdefine.org/hydrogeologic/thesaurus/related (accessed September 20, 2026). |
| Harvard | Smart Define 1970, hydrogeologic thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/hydrogeologic/thesaurus/related>. |
| MLA | Smart Define. "hydrogeologic thesaurus" 1 January 1970. Web. 20 September 2026. <https://smartdefine.org/hydrogeologic/thesaurus/related> |