| APA | Smart Define. (2016). royal line thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/royal_line/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "royal line thesaurus" https://smartdefine.org/royal_line/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, royal line thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/royal_line/thesaurus/synonyms>. |
| MLA | Smart Define. "royal line thesaurus" 30 March 2016. Web. 20 September 2026. <https://smartdefine.org/royal_line/thesaurus/synonyms> |