| APA | QHSO. (2012, February 15). In Acronym Geek. Retrieved 07:14, February 15, 2012, from http://www.acronymgeek.com/QHSO |
| MLA | "QHSO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/QHSO>. |
| MHRA | 'QHSO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/QHSO> [accessed 15 February 2012] |
| Chicago | "QHSO", http://www.acronymgeek.com/QHSO (accessed February 15, 2012). |
| CBE/CSE | QHSO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/QHSO. |
| Bluebook | QHSO, http://www.acronymgeek.com/QHSO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QHSO, http://www.acronymgeek.com/QHSO (optional description here) (as of Feb. 15, 2012, 07:14). |
| AMA | QHSO. Acronym Geek. February 15, 2012, 07:14. Available at: http://www.acronymgeek.com/QHSO. Accessed February 15, 2012, 07:14. |