Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). half-hourly. Retrieved September 21, 2026, from http://smartdefine.org/half-hourly/definitions/2014708 |
| Chicago | Webster's. 2011. "half-hourly" http://smartdefine.org/half-hourly/definitions/2014708 (accessed September 21, 2026). |
| Harvard | Webster's 2011, half-hourly, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/half-hourly/definitions/2014708>. |
| MLA | Webster's. "half-hourly" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/half-hourly/definitions/2014708> |