| APA | Smart Define. (1970). global sea level observing system thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/global_sea_level_observing_system/thesaurus/broader |
| Chicago | Smart Define. 1970. "global sea level observing system thesaurus" https://smartdefine.org/global_sea_level_observing_system/thesaurus/broader (accessed September 20, 2026). |
| Harvard | Smart Define 1970, global sea level observing system thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/global_sea_level_observing_system/thesaurus/broader>. |
| MLA | Smart Define. "global sea level observing system thesaurus" 1 January 1970. Web. 20 September 2026. <https://smartdefine.org/global_sea_level_observing_system/thesaurus/broader> |