| APA | HHNK. (2012, February 12). In Acronym Geek. Retrieved 07:19, February 12, 2012, from http://www.acronymgeek.com/HHNK |
| MLA | "HHNK." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/HHNK>. |
| MHRA | 'HHNK', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/HHNK> [accessed 12 February 2012] |
| Chicago | "HHNK", http://www.acronymgeek.com/HHNK (accessed February 12, 2012). |
| CBE/CSE | HHNK [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/HHNK. |
| Bluebook | HHNK, http://www.acronymgeek.com/HHNK (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHNK, http://www.acronymgeek.com/HHNK (optional description here) (as of Feb. 12, 2012, 07:19). |
| AMA | HHNK. Acronym Geek. February 12, 2012, 07:19. Available at: http://www.acronymgeek.com/HHNK. Accessed February 12, 2012, 07:19. |