| APA | Smart Define. (2016). travelling salesman thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/travelling_salesman/thesaurus/narrower |
| Chicago | Smart Define. 2016. "travelling salesman thesaurus" https://smartdefine.org/travelling_salesman/thesaurus/narrower (accessed October 1, 2026). |
| Harvard | Smart Define 2016, travelling salesman thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/travelling_salesman/thesaurus/narrower>. |
| MLA | Smart Define. "travelling salesman thesaurus" 30 March 2016. Web. 1 October 2026. <https://smartdefine.org/travelling_salesman/thesaurus/narrower> |