| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/arduous/thesaurus/related |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/related (accessed September 24, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/arduous/thesaurus/related>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/arduous/thesaurus/related> |