| APA | Smart Define. (2015). fuel oil thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/fuel_oil/thesaurus/narrower |
| Chicago | Smart Define. 2015. "fuel oil thesaurus" https://smartdefine.org/fuel_oil/thesaurus/narrower (accessed September 28, 2026). |
| Harvard | Smart Define 2015, fuel oil thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/fuel_oil/thesaurus/narrower>. |
| MLA | Smart Define. "fuel oil thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/fuel_oil/thesaurus/narrower> |