| APA | PPEM. (2012, February 16). In Acronym Geek. Retrieved 03:13, February 16, 2012, from http://www.acronymgeek.com/PPEM |
| MLA | "PPEM." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PPEM>. |
| MHRA | 'PPEM', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PPEM> [accessed 16 February 2012] |
| Chicago | "PPEM", http://www.acronymgeek.com/PPEM (accessed February 16, 2012). |
| CBE/CSE | PPEM [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PPEM. |
| Bluebook | PPEM, http://www.acronymgeek.com/PPEM (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PPEM, http://www.acronymgeek.com/PPEM (optional description here) (as of Feb. 16, 2012, 03:13). |
| AMA | PPEM. Acronym Geek. February 16, 2012, 03:13. Available at: http://www.acronymgeek.com/PPEM. Accessed February 16, 2012, 03:13. |