Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). prolongable. Retrieved September 23, 2026, from http://smartdefine.org/prolongable/definitions/2049735 |
| Chicago | Webster's. 2011. "prolongable" http://smartdefine.org/prolongable/definitions/2049735 (accessed September 23, 2026). |
| Harvard | Webster's 2011, prolongable, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/prolongable/definitions/2049735>. |
| MLA | Webster's. "prolongable" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/prolongable/definitions/2049735> |