Joan Ellis
| APA | Joan Ellis. (2011). Kostenka. Retrieved September 21, 2026, from http://smartdefine.org/kostenka/definitions/1371091 |
| Chicago | Joan Ellis. 2011. "Kostenka" http://smartdefine.org/kostenka/definitions/1371091 (accessed September 21, 2026). |
| Harvard | Joan Ellis 2011, Kostenka, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/kostenka/definitions/1371091>. |
| MLA | Joan Ellis. "Kostenka" 25 February 2011. Web. 21 September 2026. <http://smartdefine.org/kostenka/definitions/1371091> |