| APA | PTP. (2012, February 9). In Acronym Geek. Retrieved 01:58, February 9, 2012, from http://www.acronymgeek.com/PTP |
| MLA | "PTP." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/PTP>. |
| MHRA | 'PTP', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/PTP> [accessed 9 February 2012] |
| Chicago | "PTP", http://www.acronymgeek.com/PTP (accessed February 9, 2012). |
| CBE/CSE | PTP [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/PTP. |
| Bluebook | PTP, http://www.acronymgeek.com/PTP (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTP, http://www.acronymgeek.com/PTP (optional description here) (as of Feb. 9, 2012, 01:58). |
| AMA | PTP. Acronym Geek. February 9, 2012, 01:58. Available at: http://www.acronymgeek.com/PTP. Accessed February 9, 2012, 01:58. |