| APA | Smart Define. (2011). mass-energy equivalence thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mass-energy_equivalence/thesaurus/broader |
| Chicago | Smart Define. 2011. "mass-energy equivalence thesaurus" https://smartdefine.org/mass-energy_equivalence/thesaurus/broader (accessed September 28, 2026). |
| Harvard | Smart Define 2011, mass-energy equivalence thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mass-energy_equivalence/thesaurus/broader>. |
| MLA | Smart Define. "mass-energy equivalence thesaurus" 26 April 2011. Web. 28 September 2026. <https://smartdefine.org/mass-energy_equivalence/thesaurus/broader> |