| APA | HPT. (2012, February 9). In Acronym Geek. Retrieved 13:11, February 9, 2012, from http://www.acronymgeek.com/HPT |
| MLA | "HPT." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/HPT>. |
| MHRA | 'HPT', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/HPT> [accessed 9 February 2012] |
| Chicago | "HPT", http://www.acronymgeek.com/HPT (accessed February 9, 2012). |
| CBE/CSE | HPT [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/HPT. |
| Bluebook | HPT, http://www.acronymgeek.com/HPT (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HPT, http://www.acronymgeek.com/HPT (optional description here) (as of Feb. 9, 2012, 13:11). |
| AMA | HPT. Acronym Geek. February 9, 2012, 13:11. Available at: http://www.acronymgeek.com/HPT. Accessed February 9, 2012, 13:11. |