| APA | Smart Define. (1970). mid-continent paleobotanical colloquium thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/mid-continent_paleobotanical_colloquium/thesaurus/broader |
| Chicago | Smart Define. 1970. "mid-continent paleobotanical colloquium thesaurus" https://smartdefine.org/mid-continent_paleobotanical_colloquium/thesaurus/broader (accessed October 1, 2026). |
| Harvard | Smart Define 1970, mid-continent paleobotanical colloquium thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/mid-continent_paleobotanical_colloquium/thesaurus/broader>. |
| MLA | Smart Define. "mid-continent paleobotanical colloquium thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/mid-continent_paleobotanical_colloquium/thesaurus/broader> |