| APA | Smart Define. (1970). scientific study of animals thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/scientific_study_of_animals/thesaurus/narrower |
| Chicago | Smart Define. 1970. "scientific study of animals thesaurus" https://smartdefine.org/scientific_study_of_animals/thesaurus/narrower (accessed September 23, 2026). |
| Harvard | Smart Define 1970, scientific study of animals thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/scientific_study_of_animals/thesaurus/narrower>. |
| MLA | Smart Define. "scientific study of animals thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/scientific_study_of_animals/thesaurus/narrower> |