| APA | HK. (2012, February 9). In Acronym Geek. Retrieved 17:49, February 9, 2012, from http://www.acronymgeek.com/HK |
| MLA | "HK." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/HK>. |
| MHRA | 'HK', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/HK> [accessed 9 February 2012] |
| Chicago | "HK", http://www.acronymgeek.com/HK (accessed February 9, 2012). |
| CBE/CSE | HK [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/HK. |
| Bluebook | HK, http://www.acronymgeek.com/HK (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HK, http://www.acronymgeek.com/HK (optional description here) (as of Feb. 9, 2012, 17:49). |
| AMA | HK. Acronym Geek. February 9, 2012, 17:49. Available at: http://www.acronymgeek.com/HK. Accessed February 9, 2012, 17:49. |