| APA | Smart Define. (2013). dark-hearted thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/dark-hearted/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "dark-hearted thesaurus" https://smartdefine.org/dark-hearted/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, dark-hearted thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/dark-hearted/thesaurus/synonyms>. |
| MLA | Smart Define. "dark-hearted thesaurus" 15 November 2013. Web. 21 September 2026. <https://smartdefine.org/dark-hearted/thesaurus/synonyms> |