| APA | Smart Define. (2016). lightless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/lightless/thesaurus/related |
| Chicago | Smart Define. 2016. "lightless thesaurus" https://smartdefine.org/lightless/thesaurus/related (accessed September 23, 2026). |
| Harvard | Smart Define 2016, lightless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/lightless/thesaurus/related>. |
| MLA | Smart Define. "lightless thesaurus" 29 February 2016. Web. 23 September 2026. <https://smartdefine.org/lightless/thesaurus/related> |