| APA | PDFE. (2012, February 16). In Acronym Geek. Retrieved 19:21, February 16, 2012, from http://www.acronymgeek.com/PDFE |
| MLA | "PDFE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PDFE>. |
| MHRA | 'PDFE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PDFE> [accessed 16 February 2012] |
| Chicago | "PDFE", http://www.acronymgeek.com/PDFE (accessed February 16, 2012). |
| CBE/CSE | PDFE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PDFE. |
| Bluebook | PDFE, http://www.acronymgeek.com/PDFE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PDFE, http://www.acronymgeek.com/PDFE (optional description here) (as of Feb. 16, 2012, 19:21). |
| AMA | PDFE. Acronym Geek. February 16, 2012, 19:21. Available at: http://www.acronymgeek.com/PDFE. Accessed February 16, 2012, 19:21. |