Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). norma. Retrieved September 22, 2026, from http://smartdefine.org/norma/definitions/2037316 |
| Chicago | Webster's. 2011. "norma" http://smartdefine.org/norma/definitions/2037316 (accessed September 22, 2026). |
| Harvard | Webster's 2011, norma, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/norma/definitions/2037316>. |
| MLA | Webster's. "norma" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/norma/definitions/2037316> |