| APA | HFSK. (2012, February 16). In Acronym Geek. Retrieved 19:59, February 16, 2012, from http://www.acronymgeek.com/HFSK |
| MLA | "HFSK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HFSK>. |
| MHRA | 'HFSK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HFSK> [accessed 16 February 2012] |
| Chicago | "HFSK", http://www.acronymgeek.com/HFSK (accessed February 16, 2012). |
| CBE/CSE | HFSK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HFSK. |
| Bluebook | HFSK, http://www.acronymgeek.com/HFSK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HFSK, http://www.acronymgeek.com/HFSK (optional description here) (as of Feb. 16, 2012, 19:59). |
| AMA | HFSK. Acronym Geek. February 16, 2012, 19:59. Available at: http://www.acronymgeek.com/HFSK. Accessed February 16, 2012, 19:59. |