| APA | Smart Define. (1970). previously blank area on the map thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/previously_blank_area_on_the_map/thesaurus/broader |
| Chicago | Smart Define. 1970. "previously blank area on the map thesaurus" https://smartdefine.org/previously_blank_area_on_the_map/thesaurus/broader (accessed September 22, 2026). |
| Harvard | Smart Define 1970, previously blank area on the map thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/previously_blank_area_on_the_map/thesaurus/broader>. |
| MLA | Smart Define. "previously blank area on the map thesaurus" 1 January 1970. Web. 22 September 2026. <https://smartdefine.org/previously_blank_area_on_the_map/thesaurus/broader> |