| APA | HRRN. (2012, February 15). In Acronym Geek. Retrieved 16:57, February 15, 2012, from http://www.acronymgeek.com/HRRN |
| MLA | "HRRN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HRRN>. |
| MHRA | 'HRRN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HRRN> [accessed 15 February 2012] |
| Chicago | "HRRN", http://www.acronymgeek.com/HRRN (accessed February 15, 2012). |
| CBE/CSE | HRRN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HRRN. |
| Bluebook | HRRN, http://www.acronymgeek.com/HRRN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRRN, http://www.acronymgeek.com/HRRN (optional description here) (as of Feb. 15, 2012, 16:57). |
| AMA | HRRN. Acronym Geek. February 15, 2012, 16:57. Available at: http://www.acronymgeek.com/HRRN. Accessed February 15, 2012, 16:57. |