| APA | DDPF. (2012, February 15). In Acronym Geek. Retrieved 10:20, February 15, 2012, from http://www.acronymgeek.com/DDPF |
| MLA | "DDPF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DDPF>. |
| MHRA | 'DDPF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DDPF> [accessed 15 February 2012] |
| Chicago | "DDPF", http://www.acronymgeek.com/DDPF (accessed February 15, 2012). |
| CBE/CSE | DDPF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DDPF. |
| Bluebook | DDPF, http://www.acronymgeek.com/DDPF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDPF, http://www.acronymgeek.com/DDPF (optional description here) (as of Feb. 15, 2012, 10:20). |
| AMA | DDPF. Acronym Geek. February 15, 2012, 10:20. Available at: http://www.acronymgeek.com/DDPF. Accessed February 15, 2012, 10:20. |