| APA | HAPK. (2012, February 17). In Acronym Geek. Retrieved 03:38, February 17, 2012, from http://www.acronymgeek.com/HAPK |
| MLA | "HAPK." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HAPK>. |
| MHRA | 'HAPK', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HAPK> [accessed 17 February 2012] |
| Chicago | "HAPK", http://www.acronymgeek.com/HAPK (accessed February 17, 2012). |
| CBE/CSE | HAPK [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HAPK. |
| Bluebook | HAPK, http://www.acronymgeek.com/HAPK (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAPK, http://www.acronymgeek.com/HAPK (optional description here) (as of Feb. 17, 2012, 03:38). |
| AMA | HAPK. Acronym Geek. February 17, 2012, 03:38. Available at: http://www.acronymgeek.com/HAPK. Accessed February 17, 2012, 03:38. |