| APA | Smart Define. (2011). major form class thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/major_form_class/thesaurus/broader |
| Chicago | Smart Define. 2011. "major form class thesaurus" https://smartdefine.org/major_form_class/thesaurus/broader (accessed September 22, 2026). |
| Harvard | Smart Define 2011, major form class thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/major_form_class/thesaurus/broader>. |
| MLA | Smart Define. "major form class thesaurus" 26 April 2011. Web. 22 September 2026. <https://smartdefine.org/major_form_class/thesaurus/broader> |