| APA | BPEO. (2012, February 16). In Acronym Geek. Retrieved 07:27, February 16, 2012, from http://www.acronymgeek.com/BPEO |
| MLA | "BPEO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/BPEO>. |
| MHRA | 'BPEO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/BPEO> [accessed 16 February 2012] |
| Chicago | "BPEO", http://www.acronymgeek.com/BPEO (accessed February 16, 2012). |
| CBE/CSE | BPEO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/BPEO. |
| Bluebook | BPEO, http://www.acronymgeek.com/BPEO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BPEO, http://www.acronymgeek.com/BPEO (optional description here) (as of Feb. 16, 2012, 07:27). |
| AMA | BPEO. Acronym Geek. February 16, 2012, 07:27. Available at: http://www.acronymgeek.com/BPEO. Accessed February 16, 2012, 07:27. |