| APA | Smart Define. (1970). free from undesirable plants thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/free_from_undesirable_plants/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "free from undesirable plants thesaurus" https://smartdefine.org/free_from_undesirable_plants/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 1970, free from undesirable plants thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/free_from_undesirable_plants/thesaurus/synonyms>. |
| MLA | Smart Define. "free from undesirable plants thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/free_from_undesirable_plants/thesaurus/synonyms> |