(n.) Fluorine.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). phthor. Retrieved September 28, 2026, from http://smartdefine.org/phthor/definitions/2045085 |
| Chicago | Webster's. 2011. "phthor" http://smartdefine.org/phthor/definitions/2045085 (accessed September 28, 2026). |
| Harvard | Webster's 2011, phthor, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/phthor/definitions/2045085>. |
| MLA | Webster's. "phthor" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/phthor/definitions/2045085> |