| APA | Smart Define. (2013). geodetic observers thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/geodetic_observers/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "geodetic observers thesaurus" https://smartdefine.org/geodetic_observers/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, geodetic observers thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/geodetic_observers/thesaurus/synonyms>. |
| MLA | Smart Define. "geodetic observers thesaurus" 18 May 2013. Web. 21 September 2026. <https://smartdefine.org/geodetic_observers/thesaurus/synonyms> |