| APA | PTCF. (2012, February 10). In Acronym Geek. Retrieved 07:59, February 10, 2012, from http://www.acronymgeek.com/PTCF |
| MLA | "PTCF." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/PTCF>. |
| MHRA | 'PTCF', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/PTCF> [accessed 10 February 2012] |
| Chicago | "PTCF", http://www.acronymgeek.com/PTCF (accessed February 10, 2012). |
| CBE/CSE | PTCF [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/PTCF. |
| Bluebook | PTCF, http://www.acronymgeek.com/PTCF (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTCF, http://www.acronymgeek.com/PTCF (optional description here) (as of Feb. 10, 2012, 07:59). |
| AMA | PTCF. Acronym Geek. February 10, 2012, 07:59. Available at: http://www.acronymgeek.com/PTCF. Accessed February 10, 2012, 07:59. |