| APA | Smart Define. (2011). device to prevent speech thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/device_to_prevent_speech/thesaurus/narrower |
| Chicago | Smart Define. 2011. "device to prevent speech thesaurus" https://smartdefine.org/device_to_prevent_speech/thesaurus/narrower (accessed September 20, 2026). |
| Harvard | Smart Define 2011, device to prevent speech thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/device_to_prevent_speech/thesaurus/narrower>. |
| MLA | Smart Define. "device to prevent speech thesaurus" 2 May 2011. Web. 20 September 2026. <https://smartdefine.org/device_to_prevent_speech/thesaurus/narrower> |