| APA | HTPF. (2012, February 11). In Acronym Geek. Retrieved 19:14, February 11, 2012, from http://www.acronymgeek.com/HTPF |
| MLA | "HTPF." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HTPF>. |
| MHRA | 'HTPF', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HTPF> [accessed 11 February 2012] |
| Chicago | "HTPF", http://www.acronymgeek.com/HTPF (accessed February 11, 2012). |
| CBE/CSE | HTPF [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HTPF. |
| Bluebook | HTPF, http://www.acronymgeek.com/HTPF (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPF, http://www.acronymgeek.com/HTPF (optional description here) (as of Feb. 11, 2012, 19:14). |
| AMA | HTPF. Acronym Geek. February 11, 2012, 19:14. Available at: http://www.acronymgeek.com/HTPF. Accessed February 11, 2012, 19:14. |