| APA | PTAD. (2012, February 15). In Acronym Geek. Retrieved 17:10, February 15, 2012, from http://www.acronymgeek.com/PTAD |
| MLA | "PTAD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PTAD>. |
| MHRA | 'PTAD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PTAD> [accessed 15 February 2012] |
| Chicago | "PTAD", http://www.acronymgeek.com/PTAD (accessed February 15, 2012). |
| CBE/CSE | PTAD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PTAD. |
| Bluebook | PTAD, http://www.acronymgeek.com/PTAD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTAD, http://www.acronymgeek.com/PTAD (optional description here) (as of Feb. 15, 2012, 17:10). |
| AMA | PTAD. Acronym Geek. February 15, 2012, 17:10. Available at: http://www.acronymgeek.com/PTAD. Accessed February 15, 2012, 17:10. |