| APA | Smart Define. (2016). since the early days thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/since_the_early_days/thesaurus/related |
| Chicago | Smart Define. 2016. "since the early days thesaurus" https://smartdefine.org/since_the_early_days/thesaurus/related (accessed October 1, 2026). |
| Harvard | Smart Define 2016, since the early days thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/since_the_early_days/thesaurus/related>. |
| MLA | Smart Define. "since the early days thesaurus" 1 April 2016. Web. 1 October 2026. <https://smartdefine.org/since_the_early_days/thesaurus/related> |