| APA | HTPTF. (2012, February 12). In Acronym Geek. Retrieved 11:52, February 12, 2012, from http://www.acronymgeek.com/HTPTF |
| MLA | "HTPTF." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/HTPTF>. |
| MHRA | 'HTPTF', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/HTPTF> [accessed 12 February 2012] |
| Chicago | "HTPTF", http://www.acronymgeek.com/HTPTF (accessed February 12, 2012). |
| CBE/CSE | HTPTF [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/HTPTF. |
| Bluebook | HTPTF, http://www.acronymgeek.com/HTPTF (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPTF, http://www.acronymgeek.com/HTPTF (optional description here) (as of Feb. 12, 2012, 11:52). |
| AMA | HTPTF. Acronym Geek. February 12, 2012, 11:52. Available at: http://www.acronymgeek.com/HTPTF. Accessed February 12, 2012, 11:52. |