| APA | Smart Define. (2013). crude oil washing thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/crude_oil_washing/thesaurus/related |
| Chicago | Smart Define. 2013. "crude oil washing thesaurus" https://smartdefine.org/crude_oil_washing/thesaurus/related (accessed October 2, 2026). |
| Harvard | Smart Define 2013, crude oil washing thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/crude_oil_washing/thesaurus/related>. |
| MLA | Smart Define. "crude oil washing thesaurus" 17 May 2013. Web. 2 October 2026. <https://smartdefine.org/crude_oil_washing/thesaurus/related> |