| APA | HHFK. (2012, February 16). In Acronym Geek. Retrieved 16:38, February 16, 2012, from http://www.acronymgeek.com/HHFK |
| MLA | "HHFK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HHFK>. |
| MHRA | 'HHFK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HHFK> [accessed 16 February 2012] |
| Chicago | "HHFK", http://www.acronymgeek.com/HHFK (accessed February 16, 2012). |
| CBE/CSE | HHFK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HHFK. |
| Bluebook | HHFK, http://www.acronymgeek.com/HHFK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFK, http://www.acronymgeek.com/HHFK (optional description here) (as of Feb. 16, 2012, 16:38). |
| AMA | HHFK. Acronym Geek. February 16, 2012, 16:38. Available at: http://www.acronymgeek.com/HHFK. Accessed February 16, 2012, 16:38. |