| APA | Smart Define. (2013). birth prevention thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/birth_prevention/thesaurus/narrower |
| Chicago | Smart Define. 2013. "birth prevention thesaurus" https://smartdefine.org/birth_prevention/thesaurus/narrower (accessed September 26, 2026). |
| Harvard | Smart Define 2013, birth prevention thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/birth_prevention/thesaurus/narrower>. |
| MLA | Smart Define. "birth prevention thesaurus" 19 May 2013. Web. 26 September 2026. <https://smartdefine.org/birth_prevention/thesaurus/narrower> |