| APA | Smart Define. (2011). upon one's guard thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/upon_one%27s_guard/thesaurus/related |
| Chicago | Smart Define. 2011. "upon one's guard thesaurus" https://smartdefine.org/upon_one%27s_guard/thesaurus/related (accessed September 30, 2026). |
| Harvard | Smart Define 2011, upon one's guard thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/upon_one%27s_guard/thesaurus/related>. |
| MLA | Smart Define. "upon one's guard thesaurus" 23 May 2011. Web. 30 September 2026. <https://smartdefine.org/upon_one%27s_guard/thesaurus/related> |