| APA | Smart Define. (1970). physical lightness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/physical_lightness/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "physical lightness thesaurus" https://smartdefine.org/physical_lightness/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 1970, physical lightness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/physical_lightness/thesaurus/synonyms>. |
| MLA | Smart Define. "physical lightness thesaurus" 1 January 1970. Web. 21 September 2026. <https://smartdefine.org/physical_lightness/thesaurus/synonyms> |