| APA | PEM. (2012, February 14). In Acronym Geek. Retrieved 03:51, February 14, 2012, from http://www.acronymgeek.com/PEM |
| MLA | "PEM." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PEM>. |
| MHRA | 'PEM', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PEM> [accessed 14 February 2012] |
| Chicago | "PEM", http://www.acronymgeek.com/PEM (accessed February 14, 2012). |
| CBE/CSE | PEM [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PEM. |
| Bluebook | PEM, http://www.acronymgeek.com/PEM (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PEM, http://www.acronymgeek.com/PEM (optional description here) (as of Feb. 14, 2012, 03:51). |
| AMA | PEM. Acronym Geek. February 14, 2012, 03:51. Available at: http://www.acronymgeek.com/PEM. Accessed February 14, 2012, 03:51. |