| APA | Smart Define. (1970). hedgehog anti-tank obstacle thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/hedgehog_anti-tank_obstacle/thesaurus/broader |
| Chicago | Smart Define. 1970. "hedgehog anti-tank obstacle thesaurus" https://smartdefine.org/hedgehog_anti-tank_obstacle/thesaurus/broader (accessed October 1, 2026). |
| Harvard | Smart Define 1970, hedgehog anti-tank obstacle thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/hedgehog_anti-tank_obstacle/thesaurus/broader>. |
| MLA | Smart Define. "hedgehog anti-tank obstacle thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/hedgehog_anti-tank_obstacle/thesaurus/broader> |