| APA | HSVO. (2012, February 16). In Acronym Geek. Retrieved 04:15, February 16, 2012, from http://www.acronymgeek.com/HSVO |
| MLA | "HSVO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HSVO>. |
| MHRA | 'HSVO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HSVO> [accessed 16 February 2012] |
| Chicago | "HSVO", http://www.acronymgeek.com/HSVO (accessed February 16, 2012). |
| CBE/CSE | HSVO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HSVO. |
| Bluebook | HSVO, http://www.acronymgeek.com/HSVO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HSVO, http://www.acronymgeek.com/HSVO (optional description here) (as of Feb. 16, 2012, 04:15). |
| AMA | HSVO. Acronym Geek. February 16, 2012, 04:15. Available at: http://www.acronymgeek.com/HSVO. Accessed February 16, 2012, 04:15. |