| APA | Smart Define. (2013). sign the mail thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sign_the_mail/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "sign the mail thesaurus" https://smartdefine.org/sign_the_mail/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2013, sign the mail thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sign_the_mail/thesaurus/synonyms>. |
| MLA | Smart Define. "sign the mail thesaurus" 18 May 2013. Web. 24 September 2026. <https://smartdefine.org/sign_the_mail/thesaurus/synonyms> |