| APA | HKOD. (2012, February 15). In Acronym Geek. Retrieved 12:46, February 15, 2012, from http://www.acronymgeek.com/HKOD |
| MLA | "HKOD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HKOD>. |
| MHRA | 'HKOD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HKOD> [accessed 15 February 2012] |
| Chicago | "HKOD", http://www.acronymgeek.com/HKOD (accessed February 15, 2012). |
| CBE/CSE | HKOD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HKOD. |
| Bluebook | HKOD, http://www.acronymgeek.com/HKOD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HKOD, http://www.acronymgeek.com/HKOD (optional description here) (as of Feb. 15, 2012, 12:46). |
| AMA | HKOD. Acronym Geek. February 15, 2012, 12:46. Available at: http://www.acronymgeek.com/HKOD. Accessed February 15, 2012, 12:46. |