| APA | Smart Define. (1970). adjustable-focus eyeglasses thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/adjustable-focus_eyeglasses/thesaurus/broader |
| Chicago | Smart Define. 1970. "adjustable-focus eyeglasses thesaurus" https://smartdefine.org/adjustable-focus_eyeglasses/thesaurus/broader (accessed September 28, 2026). |
| Harvard | Smart Define 1970, adjustable-focus eyeglasses thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/adjustable-focus_eyeglasses/thesaurus/broader>. |
| MLA | Smart Define. "adjustable-focus eyeglasses thesaurus" 1 January 1970. Web. 28 September 2026. <https://smartdefine.org/adjustable-focus_eyeglasses/thesaurus/broader> |