| APA | Smart Define. (1970). massive spheres thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/massive_spheres/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "massive spheres thesaurus" https://smartdefine.org/massive_spheres/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 1970, massive spheres thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/massive_spheres/thesaurus/synonyms>. |
| MLA | Smart Define. "massive spheres thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/massive_spheres/thesaurus/synonyms> |