| APA | LPEI. (2012, February 16). In Acronym Geek. Retrieved 06:05, February 16, 2012, from http://www.acronymgeek.com/LPEI |
| MLA | "LPEI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/LPEI>. |
| MHRA | 'LPEI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/LPEI> [accessed 16 February 2012] |
| Chicago | "LPEI", http://www.acronymgeek.com/LPEI (accessed February 16, 2012). |
| CBE/CSE | LPEI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/LPEI. |
| Bluebook | LPEI, http://www.acronymgeek.com/LPEI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, LPEI, http://www.acronymgeek.com/LPEI (optional description here) (as of Feb. 16, 2012, 06:05). |
| AMA | LPEI. Acronym Geek. February 16, 2012, 06:05. Available at: http://www.acronymgeek.com/LPEI. Accessed February 16, 2012, 06:05. |