| APA | Smart Define. (2013). brittle maidenhair fern thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/brittle_maidenhair_fern/thesaurus/narrower |
| Chicago | Smart Define. 2013. "brittle maidenhair fern thesaurus" https://smartdefine.org/brittle_maidenhair_fern/thesaurus/narrower (accessed October 1, 2026). |
| Harvard | Smart Define 2013, brittle maidenhair fern thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/brittle_maidenhair_fern/thesaurus/narrower>. |
| MLA | Smart Define. "brittle maidenhair fern thesaurus" 18 May 2013. Web. 1 October 2026. <https://smartdefine.org/brittle_maidenhair_fern/thesaurus/narrower> |