| APA | Smart Define. (2015). ship's warning device thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ship%27s_warning_device/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ship's warning device thesaurus" https://smartdefine.org/ship%27s_warning_device/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, ship's warning device thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ship%27s_warning_device/thesaurus/synonyms>. |
| MLA | Smart Define. "ship's warning device thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/ship%27s_warning_device/thesaurus/synonyms> |