Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). con-. Retrieved September 20, 2026, from http://smartdefine.org/con-/definitions/1989811 |
| Chicago | Webster's. 2011. "con-" http://smartdefine.org/con-/definitions/1989811 (accessed September 20, 2026). |
| Harvard | Webster's 2011, con-, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/con-/definitions/1989811>. |
| MLA | Webster's. "con-" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/con-/definitions/1989811> |