| APA | HTOC. (2012, February 15). In Acronym Geek. Retrieved 23:48, February 15, 2012, from http://www.acronymgeek.com/HTOC |
| MLA | "HTOC." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HTOC>. |
| MHRA | 'HTOC', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HTOC> [accessed 15 February 2012] |
| Chicago | "HTOC", http://www.acronymgeek.com/HTOC (accessed February 15, 2012). |
| CBE/CSE | HTOC [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HTOC. |
| Bluebook | HTOC, http://www.acronymgeek.com/HTOC (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTOC, http://www.acronymgeek.com/HTOC (optional description here) (as of Feb. 15, 2012, 23:48). |
| AMA | HTOC. Acronym Geek. February 15, 2012, 23:48. Available at: http://www.acronymgeek.com/HTOC. Accessed February 15, 2012, 23:48. |