| APA | HRRK. (2012, February 17). In Acronym Geek. Retrieved 06:35, February 17, 2012, from http://www.acronymgeek.com/HRRK |
| MLA | "HRRK." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HRRK>. |
| MHRA | 'HRRK', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HRRK> [accessed 17 February 2012] |
| Chicago | "HRRK", http://www.acronymgeek.com/HRRK (accessed February 17, 2012). |
| CBE/CSE | HRRK [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HRRK. |
| Bluebook | HRRK, http://www.acronymgeek.com/HRRK (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRRK, http://www.acronymgeek.com/HRRK (optional description here) (as of Feb. 17, 2012, 06:35). |
| AMA | HRRK. Acronym Geek. February 17, 2012, 06:35. Available at: http://www.acronymgeek.com/HRRK. Accessed February 17, 2012, 06:35. |