| APA | HVTO. (2012, February 17). In Acronym Geek. Retrieved 06:47, February 17, 2012, from http://www.acronymgeek.com/HVTO |
| MLA | "HVTO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HVTO>. |
| MHRA | 'HVTO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HVTO> [accessed 17 February 2012] |
| Chicago | "HVTO", http://www.acronymgeek.com/HVTO (accessed February 17, 2012). |
| CBE/CSE | HVTO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HVTO. |
| Bluebook | HVTO, http://www.acronymgeek.com/HVTO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HVTO, http://www.acronymgeek.com/HVTO (optional description here) (as of Feb. 17, 2012, 06:47). |
| AMA | HVTO. Acronym Geek. February 17, 2012, 06:47. Available at: http://www.acronymgeek.com/HVTO. Accessed February 17, 2012, 06:47. |