| APA | Smart Define. (1970). left open thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/left_open/thesaurus/related |
| Chicago | Smart Define. 1970. "left open thesaurus" https://smartdefine.org/left_open/thesaurus/related (accessed September 21, 2026). |
| Harvard | Smart Define 1970, left open thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/left_open/thesaurus/related>. |
| MLA | Smart Define. "left open thesaurus" 1 January 1970. Web. 21 September 2026. <https://smartdefine.org/left_open/thesaurus/related> |