| APA | HKOG. (2012, February 16). In Acronym Geek. Retrieved 22:33, February 16, 2012, from http://www.acronymgeek.com/HKOG |
| MLA | "HKOG." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HKOG>. |
| MHRA | 'HKOG', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HKOG> [accessed 16 February 2012] |
| Chicago | "HKOG", http://www.acronymgeek.com/HKOG (accessed February 16, 2012). |
| CBE/CSE | HKOG [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HKOG. |
| Bluebook | HKOG, http://www.acronymgeek.com/HKOG (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HKOG, http://www.acronymgeek.com/HKOG (optional description here) (as of Feb. 16, 2012, 22:33). |
| AMA | HKOG. Acronym Geek. February 16, 2012, 22:33. Available at: http://www.acronymgeek.com/HKOG. Accessed February 16, 2012, 22:33. |