| APA | HLL. (2012, February 10). In Acronym Geek. Retrieved 17:11, February 10, 2012, from http://www.acronymgeek.com/HLL |
| MLA | "HLL." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HLL>. |
| MHRA | 'HLL', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HLL> [accessed 10 February 2012] |
| Chicago | "HLL", http://www.acronymgeek.com/HLL (accessed February 10, 2012). |
| CBE/CSE | HLL [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HLL. |
| Bluebook | HLL, http://www.acronymgeek.com/HLL (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLL, http://www.acronymgeek.com/HLL (optional description here) (as of Feb. 10, 2012, 17:11). |
| AMA | HLL. Acronym Geek. February 10, 2012, 17:11. Available at: http://www.acronymgeek.com/HLL. Accessed February 10, 2012, 17:11. |