| APA | Smart Define. (2016). black gold thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/black_gold/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "black gold thesaurus" https://smartdefine.org/black_gold/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, black gold thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/black_gold/thesaurus/synonyms>. |
| MLA | Smart Define. "black gold thesaurus" 30 March 2016. Web. 21 September 2026. <https://smartdefine.org/black_gold/thesaurus/synonyms> |