| APA | Smart Define. (1970). earth's magnetic field thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/earth%27s_magnetic_field/thesaurus/broader |
| Chicago | Smart Define. 1970. "earth's magnetic field thesaurus" https://smartdefine.org/earth%27s_magnetic_field/thesaurus/broader (accessed September 28, 2026). |
| Harvard | Smart Define 1970, earth's magnetic field thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/earth%27s_magnetic_field/thesaurus/broader>. |
| MLA | Smart Define. "earth's magnetic field thesaurus" 1 January 1970. Web. 28 September 2026. <https://smartdefine.org/earth%27s_magnetic_field/thesaurus/broader> |