| APA | PTFD. (2012, February 10). In Acronym Geek. Retrieved 17:43, February 10, 2012, from http://www.acronymgeek.com/PTFD |
| MLA | "PTFD." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/PTFD>. |
| MHRA | 'PTFD', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/PTFD> [accessed 10 February 2012] |
| Chicago | "PTFD", http://www.acronymgeek.com/PTFD (accessed February 10, 2012). |
| CBE/CSE | PTFD [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/PTFD. |
| Bluebook | PTFD, http://www.acronymgeek.com/PTFD (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTFD, http://www.acronymgeek.com/PTFD (optional description here) (as of Feb. 10, 2012, 17:43). |
| AMA | PTFD. Acronym Geek. February 10, 2012, 17:43. Available at: http://www.acronymgeek.com/PTFD. Accessed February 10, 2012, 17:43. |