| APA | Smart Define. (2011). class psilopsida thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/class_psilopsida/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "class psilopsida thesaurus" https://smartdefine.org/class_psilopsida/thesaurus/synonyms (accessed October 2, 2026). |
| Harvard | Smart Define 2011, class psilopsida thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/class_psilopsida/thesaurus/synonyms>. |
| MLA | Smart Define. "class psilopsida thesaurus" 26 April 2011. Web. 2 October 2026. <https://smartdefine.org/class_psilopsida/thesaurus/synonyms> |