| APA | Smart Define. (1970). flag of earth thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/flag_of_earth/thesaurus/related |
| Chicago | Smart Define. 1970. "flag of earth thesaurus" https://smartdefine.org/flag_of_earth/thesaurus/related (accessed September 29, 2026). |
| Harvard | Smart Define 1970, flag of earth thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/flag_of_earth/thesaurus/related>. |
| MLA | Smart Define. "flag of earth thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/flag_of_earth/thesaurus/related> |