| APA | POEO. (2012, February 14). In Acronym Geek. Retrieved 18:53, February 14, 2012, from http://www.acronymgeek.com/POEO |
| MLA | "POEO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/POEO>. |
| MHRA | 'POEO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/POEO> [accessed 14 February 2012] |
| Chicago | "POEO", http://www.acronymgeek.com/POEO (accessed February 14, 2012). |
| CBE/CSE | POEO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/POEO. |
| Bluebook | POEO, http://www.acronymgeek.com/POEO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, POEO, http://www.acronymgeek.com/POEO (optional description here) (as of Feb. 14, 2012, 18:53). |
| AMA | POEO. Acronym Geek. February 14, 2012, 18:53. Available at: http://www.acronymgeek.com/POEO. Accessed February 14, 2012, 18:53. |