| APA | HLS. (2012, February 4). In Acronym Geek. Retrieved 11:54, February 4, 2012, from http://www.acronymgeek.com/HLS |
| MLA | "HLS." Acronym Geek. (2012). Acronym Geek. 4 Feb 2012 <http://www.acronymgeek.com/HLS>. |
| MHRA | 'HLS', Acronym Geek, 4 February 2012, <http://www.acronymgeek.com/HLS> [accessed 4 February 2012] |
| Chicago | "HLS", http://www.acronymgeek.com/HLS (accessed February 4, 2012). |
| CBE/CSE | HLS [Internet]. Acronym Geek; 2012 Feb 4 [cited 2012 Feb 4]. Available from: http://www.acronymgeek.com/HLS. |
| Bluebook | HLS, http://www.acronymgeek.com/HLS (last visited February 4, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLS, http://www.acronymgeek.com/HLS (optional description here) (as of Feb. 4, 2012, 11:54). |
| AMA | HLS. Acronym Geek. February 4, 2012, 11:54. Available at: http://www.acronymgeek.com/HLS. Accessed February 4, 2012, 11:54. |