| APA | HTLS. (2012, February 15). In Acronym Geek. Retrieved 11:33, February 15, 2012, from http://www.acronymgeek.com/HTLS |
| MLA | "HTLS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HTLS>. |
| MHRA | 'HTLS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HTLS> [accessed 15 February 2012] |
| Chicago | "HTLS", http://www.acronymgeek.com/HTLS (accessed February 15, 2012). |
| CBE/CSE | HTLS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HTLS. |
| Bluebook | HTLS, http://www.acronymgeek.com/HTLS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTLS, http://www.acronymgeek.com/HTLS (optional description here) (as of Feb. 15, 2012, 11:33). |
| AMA | HTLS. Acronym Geek. February 15, 2012, 11:33. Available at: http://www.acronymgeek.com/HTLS. Accessed February 15, 2012, 11:33. |