| APA | H&K. (2012, February 10). In Acronym Geek. Retrieved 19:16, February 10, 2012, from http://www.acronymgeek.com/H&K |
| MLA | "H&K." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/H&K>. |
| MHRA | 'H&K', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/H&K> [accessed 10 February 2012] |
| Chicago | "H&K", http://www.acronymgeek.com/H&K (accessed February 10, 2012). |
| CBE/CSE | H&K [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/H&K. |
| Bluebook | H&K, http://www.acronymgeek.com/H&K (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H&K, http://www.acronymgeek.com/H&K (optional description here) (as of Feb. 10, 2012, 19:16). |
| AMA | H&K. Acronym Geek. February 10, 2012, 19:16. Available at: http://www.acronymgeek.com/H&K. Accessed February 10, 2012, 19:16. |