| APA | Smart Define. (2015). biannual thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/biannual/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "biannual thesaurus" https://smartdefine.org/biannual/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, biannual thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/biannual/thesaurus/synonyms>. |
| MLA | Smart Define. "biannual thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/biannual/thesaurus/synonyms> |