| APA | HRSO. (2012, February 15). In Acronym Geek. Retrieved 10:27, February 15, 2012, from http://www.acronymgeek.com/HRSO |
| MLA | "HRSO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HRSO>. |
| MHRA | 'HRSO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HRSO> [accessed 15 February 2012] |
| Chicago | "HRSO", http://www.acronymgeek.com/HRSO (accessed February 15, 2012). |
| CBE/CSE | HRSO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HRSO. |
| Bluebook | HRSO, http://www.acronymgeek.com/HRSO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRSO, http://www.acronymgeek.com/HRSO (optional description here) (as of Feb. 15, 2012, 10:27). |
| AMA | HRSO. Acronym Geek. February 15, 2012, 10:27. Available at: http://www.acronymgeek.com/HRSO. Accessed February 15, 2012, 10:27. |