| APA | Smart Define. (2013). extrauterine pregnancy thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/extrauterine_pregnancy/thesaurus/narrower |
| Chicago | Smart Define. 2013. "extrauterine pregnancy thesaurus" https://smartdefine.org/extrauterine_pregnancy/thesaurus/narrower (accessed September 30, 2026). |
| Harvard | Smart Define 2013, extrauterine pregnancy thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/extrauterine_pregnancy/thesaurus/narrower>. |
| MLA | Smart Define. "extrauterine pregnancy thesaurus" 18 May 2013. Web. 30 September 2026. <https://smartdefine.org/extrauterine_pregnancy/thesaurus/narrower> |