| APA | Smart Define. (2013). parasympathetic nervous system thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/parasympathetic_nervous_system/thesaurus/related |
| Chicago | Smart Define. 2013. "parasympathetic nervous system thesaurus" https://smartdefine.org/parasympathetic_nervous_system/thesaurus/related (accessed October 1, 2026). |
| Harvard | Smart Define 2013, parasympathetic nervous system thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/parasympathetic_nervous_system/thesaurus/related>. |
| MLA | Smart Define. "parasympathetic nervous system thesaurus" 18 May 2013. Web. 1 October 2026. <https://smartdefine.org/parasympathetic_nervous_system/thesaurus/related> |