| APA | DEFP. (2012, February 16). In Acronym Geek. Retrieved 00:42, February 16, 2012, from http://www.acronymgeek.com/DEFP |
| MLA | "DEFP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DEFP>. |
| MHRA | 'DEFP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DEFP> [accessed 16 February 2012] |
| Chicago | "DEFP", http://www.acronymgeek.com/DEFP (accessed February 16, 2012). |
| CBE/CSE | DEFP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DEFP. |
| Bluebook | DEFP, http://www.acronymgeek.com/DEFP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DEFP, http://www.acronymgeek.com/DEFP (optional description here) (as of Feb. 16, 2012, 00:42). |
| AMA | DEFP. Acronym Geek. February 16, 2012, 00:42. Available at: http://www.acronymgeek.com/DEFP. Accessed February 16, 2012, 00:42. |