| APA | Smart Define. (2015). cygnet's parents thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/cygnet%27s_parents/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "cygnet's parents thesaurus" https://smartdefine.org/cygnet%27s_parents/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, cygnet's parents thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/cygnet%27s_parents/thesaurus/synonyms>. |
| MLA | Smart Define. "cygnet's parents thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/cygnet%27s_parents/thesaurus/synonyms> |