| APA | Smart Define. (2016). viper thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/viper/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "viper thesaurus" https://smartdefine.org/viper/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, viper thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/viper/thesaurus/synonyms>. |
| MLA | Smart Define. "viper thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/viper/thesaurus/synonyms> |