| APA | HTL. (2012, February 14). In Acronym Geek. Retrieved 04:22, February 14, 2012, from http://www.acronymgeek.com/HTL |
| MLA | "HTL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HTL>. |
| MHRA | 'HTL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HTL> [accessed 14 February 2012] |
| Chicago | "HTL", http://www.acronymgeek.com/HTL (accessed February 14, 2012). |
| CBE/CSE | HTL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HTL. |
| Bluebook | HTL, http://www.acronymgeek.com/HTL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTL, http://www.acronymgeek.com/HTL (optional description here) (as of Feb. 14, 2012, 04:22). |
| AMA | HTL. Acronym Geek. February 14, 2012, 04:22. Available at: http://www.acronymgeek.com/HTL. Accessed February 14, 2012, 04:22. |