| APA | HARO. (2012, February 17). In Acronym Geek. Retrieved 00:55, February 17, 2012, from http://www.acronymgeek.com/HARO |
| MLA | "HARO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HARO>. |
| MHRA | 'HARO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HARO> [accessed 17 February 2012] |
| Chicago | "HARO", http://www.acronymgeek.com/HARO (accessed February 17, 2012). |
| CBE/CSE | HARO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HARO. |
| Bluebook | HARO, http://www.acronymgeek.com/HARO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HARO, http://www.acronymgeek.com/HARO (optional description here) (as of Feb. 17, 2012, 00:55). |
| AMA | HARO. Acronym Geek. February 17, 2012, 00:55. Available at: http://www.acronymgeek.com/HARO. Accessed February 17, 2012, 00:55. |