| APA | Smart Define. (1970). method of producing pure water thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/method_of_producing_pure_water/thesaurus/narrower |
| Chicago | Smart Define. 1970. "method of producing pure water thesaurus" https://smartdefine.org/method_of_producing_pure_water/thesaurus/narrower (accessed September 23, 2026). |
| Harvard | Smart Define 1970, method of producing pure water thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/method_of_producing_pure_water/thesaurus/narrower>. |
| MLA | Smart Define. "method of producing pure water thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/method_of_producing_pure_water/thesaurus/narrower> |