Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). stacking. Retrieved September 21, 2026, from http://smartdefine.org/stacking/definitions/2065692 |
| Chicago | Webster's. 2011. "stacking" http://smartdefine.org/stacking/definitions/2065692 (accessed September 21, 2026). |
| Harvard | Webster's 2011, stacking, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/stacking/definitions/2065692>. |
| MLA | Webster's. "stacking" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/stacking/definitions/2065692> |