| APA | Smart Define. (2015). cog railway thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/cog_railway/thesaurus/broader |
| Chicago | Smart Define. 2015. "cog railway thesaurus" https://smartdefine.org/cog_railway/thesaurus/broader (accessed September 27, 2026). |
| Harvard | Smart Define 2015, cog railway thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/cog_railway/thesaurus/broader>. |
| MLA | Smart Define. "cog railway thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/cog_railway/thesaurus/broader> |