| APA | POEI. (2012, February 15). In Acronym Geek. Retrieved 16:35, February 15, 2012, from http://www.acronymgeek.com/POEI |
| MLA | "POEI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/POEI>. |
| MHRA | 'POEI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/POEI> [accessed 15 February 2012] |
| Chicago | "POEI", http://www.acronymgeek.com/POEI (accessed February 15, 2012). |
| CBE/CSE | POEI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/POEI. |
| Bluebook | POEI, http://www.acronymgeek.com/POEI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, POEI, http://www.acronymgeek.com/POEI (optional description here) (as of Feb. 15, 2012, 16:35). |
| AMA | POEI. Acronym Geek. February 15, 2012, 16:35. Available at: http://www.acronymgeek.com/POEI. Accessed February 15, 2012, 16:35. |