| APA | Smart Define. (2011). soft in the head thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/soft_in_the_head/thesaurus/antonyms |
| Chicago | Smart Define. 2011. "soft in the head thesaurus" https://smartdefine.org/soft_in_the_head/thesaurus/antonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2011, soft in the head thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/soft_in_the_head/thesaurus/antonyms>. |
| MLA | Smart Define. "soft in the head thesaurus" 22 May 2011. Web. 28 September 2026. <https://smartdefine.org/soft_in_the_head/thesaurus/antonyms> |