| APA | HHFL. (2012, February 11). In Acronym Geek. Retrieved 20:39, February 11, 2012, from http://www.acronymgeek.com/HHFL |
| MLA | "HHFL." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HHFL>. |
| MHRA | 'HHFL', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HHFL> [accessed 11 February 2012] |
| Chicago | "HHFL", http://www.acronymgeek.com/HHFL (accessed February 11, 2012). |
| CBE/CSE | HHFL [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HHFL. |
| Bluebook | HHFL, http://www.acronymgeek.com/HHFL (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFL, http://www.acronymgeek.com/HHFL (optional description here) (as of Feb. 11, 2012, 20:39). |
| AMA | HHFL. Acronym Geek. February 11, 2012, 20:39. Available at: http://www.acronymgeek.com/HHFL. Accessed February 11, 2012, 20:39. |