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