Joan Ellis
| APA | Joan Ellis. (2011). case. Retrieved May 21, 2013, from http://smartdefine.org/case/definitions/1358793 |
| Chicago | Joan Ellis. 2011. "case" http://smartdefine.org/case/definitions/1358793 (accessed May 21, 2013). |
| Harvard | Joan Ellis 2011, case, Smart Define, viewed 21 May, 2013, <http://smartdefine.org/case/definitions/1358793>. |
| MLA | Joan Ellis. "case" 25 February 2011. Web. 21 May 2013. <http://smartdefine.org/case/definitions/1358793> |