| APA | HLH. (2012, February 14). In Acronym Geek. Retrieved 10:29, February 14, 2012, from http://www.acronymgeek.com/HLH |
| MLA | "HLH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HLH>. |
| MHRA | 'HLH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HLH> [accessed 14 February 2012] |
| Chicago | "HLH", http://www.acronymgeek.com/HLH (accessed February 14, 2012). |
| CBE/CSE | HLH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HLH. |
| Bluebook | HLH, http://www.acronymgeek.com/HLH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLH, http://www.acronymgeek.com/HLH (optional description here) (as of Feb. 14, 2012, 10:29). |
| AMA | HLH. Acronym Geek. February 14, 2012, 10:29. Available at: http://www.acronymgeek.com/HLH. Accessed February 14, 2012, 10:29. |