| APA | Smart Define. (1970). paleogene system of antarctica thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/paleogene_system_of_antarctica/thesaurus/broader |
| Chicago | Smart Define. 1970. "paleogene system of antarctica thesaurus" https://smartdefine.org/paleogene_system_of_antarctica/thesaurus/broader (accessed September 30, 2026). |
| Harvard | Smart Define 1970, paleogene system of antarctica thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/paleogene_system_of_antarctica/thesaurus/broader>. |
| MLA | Smart Define. "paleogene system of antarctica thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/paleogene_system_of_antarctica/thesaurus/broader> |