| APA | Smart Define. (2016). heaven knows thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/heaven_knows/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "heaven knows thesaurus" https://smartdefine.org/heaven_knows/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, heaven knows thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/heaven_knows/thesaurus/synonyms>. |
| MLA | Smart Define. "heaven knows thesaurus" 3 March 2016. Web. 23 September 2026. <https://smartdefine.org/heaven_knows/thesaurus/synonyms> |