| APA | Smart Define. (2011). phylum protozoa thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/phylum_protozoa/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "phylum protozoa thesaurus" https://smartdefine.org/phylum_protozoa/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2011, phylum protozoa thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/phylum_protozoa/thesaurus/synonyms>. |
| MLA | Smart Define. "phylum protozoa thesaurus" 26 April 2011. Web. 21 September 2026. <https://smartdefine.org/phylum_protozoa/thesaurus/synonyms> |