| APA | Smart Define. (1970). green gas heater thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/green_gas_heater/thesaurus/broader |
| Chicago | Smart Define. 1970. "green gas heater thesaurus" https://smartdefine.org/green_gas_heater/thesaurus/broader (accessed September 25, 2026). |
| Harvard | Smart Define 1970, green gas heater thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/green_gas_heater/thesaurus/broader>. |
| MLA | Smart Define. "green gas heater thesaurus" 1 January 1970. Web. 25 September 2026. <https://smartdefine.org/green_gas_heater/thesaurus/broader> |