| APA | Smart Define. (1970). scientific study of the development of humans thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/scientific_study_of_the_development_of_humans/thesaurus/narrower |
| Chicago | Smart Define. 1970. "scientific study of the development of humans thesaurus" https://smartdefine.org/scientific_study_of_the_development_of_humans/thesaurus/narrower (accessed September 27, 2026). |
| Harvard | Smart Define 1970, scientific study of the development of humans thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/scientific_study_of_the_development_of_humans/thesaurus/narrower>. |
| MLA | Smart Define. "scientific study of the development of humans thesaurus" 1 January 1970. Web. 27 September 2026. <https://smartdefine.org/scientific_study_of_the_development_of_humans/thesaurus/narrower> |