| APA | Smart Define. (1970). grassland-forest boundary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/grassland-forest_boundary/thesaurus/broader |
| Chicago | Smart Define. 1970. "grassland-forest boundary thesaurus" https://smartdefine.org/grassland-forest_boundary/thesaurus/broader (accessed September 25, 2026). |
| Harvard | Smart Define 1970, grassland-forest boundary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/grassland-forest_boundary/thesaurus/broader>. |
| MLA | Smart Define. "grassland-forest boundary thesaurus" 1 January 1970. Web. 25 September 2026. <https://smartdefine.org/grassland-forest_boundary/thesaurus/broader> |