| APA | Smart Define. (1970). hollow-horned mammal thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hollow-horned_mammal/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "hollow-horned mammal thesaurus" https://smartdefine.org/hollow-horned_mammal/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 1970, hollow-horned mammal thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hollow-horned_mammal/thesaurus/synonyms>. |
| MLA | Smart Define. "hollow-horned mammal thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/hollow-horned_mammal/thesaurus/synonyms> |