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