| APA | Smart Define. (2011). unannounced departure thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unannounced_departure/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "unannounced departure thesaurus" https://smartdefine.org/unannounced_departure/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2011, unannounced departure thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unannounced_departure/thesaurus/synonyms>. |
| MLA | Smart Define. "unannounced departure thesaurus" 22 May 2011. Web. 21 September 2026. <https://smartdefine.org/unannounced_departure/thesaurus/synonyms> |