| APA | HTOL. (2012, February 10). In Acronym Geek. Retrieved 10:29, February 10, 2012, from http://www.acronymgeek.com/HTOL |
| MLA | "HTOL." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HTOL>. |
| MHRA | 'HTOL', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HTOL> [accessed 10 February 2012] |
| Chicago | "HTOL", http://www.acronymgeek.com/HTOL (accessed February 10, 2012). |
| CBE/CSE | HTOL [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HTOL. |
| Bluebook | HTOL, http://www.acronymgeek.com/HTOL (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTOL, http://www.acronymgeek.com/HTOL (optional description here) (as of Feb. 10, 2012, 10:29). |
| AMA | HTOL. Acronym Geek. February 10, 2012, 10:29. Available at: http://www.acronymgeek.com/HTOL. Accessed February 10, 2012, 10:29. |