| APA | BSPO. (2012, February 11). In Acronym Geek. Retrieved 21:13, February 11, 2012, from http://www.acronymgeek.com/BSPO |
| MLA | "BSPO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/BSPO>. |
| MHRA | 'BSPO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/BSPO> [accessed 11 February 2012] |
| Chicago | "BSPO", http://www.acronymgeek.com/BSPO (accessed February 11, 2012). |
| CBE/CSE | BSPO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/BSPO. |
| Bluebook | BSPO, http://www.acronymgeek.com/BSPO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BSPO, http://www.acronymgeek.com/BSPO (optional description here) (as of Feb. 11, 2012, 21:13). |
| AMA | BSPO. Acronym Geek. February 11, 2012, 21:13. Available at: http://www.acronymgeek.com/BSPO. Accessed February 11, 2012, 21:13. |