| APA | HDWO. (2012, February 16). In Acronym Geek. Retrieved 04:07, February 16, 2012, from http://www.acronymgeek.com/HDWO |
| MLA | "HDWO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HDWO>. |
| MHRA | 'HDWO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HDWO> [accessed 16 February 2012] |
| Chicago | "HDWO", http://www.acronymgeek.com/HDWO (accessed February 16, 2012). |
| CBE/CSE | HDWO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HDWO. |
| Bluebook | HDWO, http://www.acronymgeek.com/HDWO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDWO, http://www.acronymgeek.com/HDWO (optional description here) (as of Feb. 16, 2012, 04:07). |
| AMA | HDWO. Acronym Geek. February 16, 2012, 04:07. Available at: http://www.acronymgeek.com/HDWO. Accessed February 16, 2012, 04:07. |