| APA | HVWO. (2012, February 15). In Acronym Geek. Retrieved 15:47, February 15, 2012, from http://www.acronymgeek.com/HVWO |
| MLA | "HVWO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HVWO>. |
| MHRA | 'HVWO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HVWO> [accessed 15 February 2012] |
| Chicago | "HVWO", http://www.acronymgeek.com/HVWO (accessed February 15, 2012). |
| CBE/CSE | HVWO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HVWO. |
| Bluebook | HVWO, http://www.acronymgeek.com/HVWO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HVWO, http://www.acronymgeek.com/HVWO (optional description here) (as of Feb. 15, 2012, 15:47). |
| AMA | HVWO. Acronym Geek. February 15, 2012, 15:47. Available at: http://www.acronymgeek.com/HVWO. Accessed February 15, 2012, 15:47. |