| APA | Smart Define. (2011). atomic number 56 thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/atomic_number_56/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "atomic number 56 thesaurus" https://smartdefine.org/atomic_number_56/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2011, atomic number 56 thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/atomic_number_56/thesaurus/synonyms>. |
| MLA | Smart Define. "atomic number 56 thesaurus" 26 April 2011. Web. 20 September 2026. <https://smartdefine.org/atomic_number_56/thesaurus/synonyms> |