| APA | HSSO. (2012, February 17). In Acronym Geek. Retrieved 01:38, February 17, 2012, from http://www.acronymgeek.com/HSSO |
| MLA | "HSSO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HSSO>. |
| MHRA | 'HSSO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HSSO> [accessed 17 February 2012] |
| Chicago | "HSSO", http://www.acronymgeek.com/HSSO (accessed February 17, 2012). |
| CBE/CSE | HSSO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HSSO. |
| Bluebook | HSSO, http://www.acronymgeek.com/HSSO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HSSO, http://www.acronymgeek.com/HSSO (optional description here) (as of Feb. 17, 2012, 01:38). |
| AMA | HSSO. Acronym Geek. February 17, 2012, 01:38. Available at: http://www.acronymgeek.com/HSSO. Accessed February 17, 2012, 01:38. |