| APA | Smart Define. (2016). guardian angel thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/guardian_angel/thesaurus/narrower |
| Chicago | Smart Define. 2016. "guardian angel thesaurus" https://smartdefine.org/guardian_angel/thesaurus/narrower (accessed September 28, 2026). |
| Harvard | Smart Define 2016, guardian angel thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/guardian_angel/thesaurus/narrower>. |
| MLA | Smart Define. "guardian angel thesaurus" 25 January 2016. Web. 28 September 2026. <https://smartdefine.org/guardian_angel/thesaurus/narrower> |