| APA | Smart Define. (1970). color of the clear sky thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/color_of_the_clear_sky/thesaurus/narrower |
| Chicago | Smart Define. 1970. "color of the clear sky thesaurus" https://smartdefine.org/color_of_the_clear_sky/thesaurus/narrower (accessed September 23, 2026). |
| Harvard | Smart Define 1970, color of the clear sky thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/color_of_the_clear_sky/thesaurus/narrower>. |
| MLA | Smart Define. "color of the clear sky thesaurus" 1 January 1970. Web. 23 September 2026. <https://smartdefine.org/color_of_the_clear_sky/thesaurus/narrower> |