| APA | Smart Define. (2015). head-on thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/head-on/thesaurus/related |
| Chicago | Smart Define. 2015. "head-on thesaurus" https://smartdefine.org/head-on/thesaurus/related (accessed September 27, 2026). |
| Harvard | Smart Define 2015, head-on thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/head-on/thesaurus/related>. |
| MLA | Smart Define. "head-on thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/head-on/thesaurus/related> |