| APA | Smart Define. (2011). bird-footed dinosaur thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/bird-footed_dinosaur/thesaurus/narrower |
| Chicago | Smart Define. 2011. "bird-footed dinosaur thesaurus" https://smartdefine.org/bird-footed_dinosaur/thesaurus/narrower (accessed September 27, 2026). |
| Harvard | Smart Define 2011, bird-footed dinosaur thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/bird-footed_dinosaur/thesaurus/narrower>. |
| MLA | Smart Define. "bird-footed dinosaur thesaurus" 26 April 2011. Web. 27 September 2026. <https://smartdefine.org/bird-footed_dinosaur/thesaurus/narrower> |