| APA | HTPK. (2012, February 15). In Acronym Geek. Retrieved 22:55, February 15, 2012, from http://www.acronymgeek.com/HTPK |
| MLA | "HTPK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HTPK>. |
| MHRA | 'HTPK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HTPK> [accessed 15 February 2012] |
| Chicago | "HTPK", http://www.acronymgeek.com/HTPK (accessed February 15, 2012). |
| CBE/CSE | HTPK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HTPK. |
| Bluebook | HTPK, http://www.acronymgeek.com/HTPK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPK, http://www.acronymgeek.com/HTPK (optional description here) (as of Feb. 15, 2012, 22:55). |
| AMA | HTPK. Acronym Geek. February 15, 2012, 22:55. Available at: http://www.acronymgeek.com/HTPK. Accessed February 15, 2012, 22:55. |