| APA | PTHH. (2012, February 16). In Acronym Geek. Retrieved 08:40, February 16, 2012, from http://www.acronymgeek.com/PTHH |
| MLA | "PTHH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PTHH>. |
| MHRA | 'PTHH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PTHH> [accessed 16 February 2012] |
| Chicago | "PTHH", http://www.acronymgeek.com/PTHH (accessed February 16, 2012). |
| CBE/CSE | PTHH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PTHH. |
| Bluebook | PTHH, http://www.acronymgeek.com/PTHH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTHH, http://www.acronymgeek.com/PTHH (optional description here) (as of Feb. 16, 2012, 08:40). |
| AMA | PTHH. Acronym Geek. February 16, 2012, 08:40. Available at: http://www.acronymgeek.com/PTHH. Accessed February 16, 2012, 08:40. |