| APA | UPSO. (2012, February 11). In Acronym Geek. Retrieved 13:18, February 11, 2012, from http://www.acronymgeek.com/UPSO |
| MLA | "UPSO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/UPSO>. |
| MHRA | 'UPSO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/UPSO> [accessed 11 February 2012] |
| Chicago | "UPSO", http://www.acronymgeek.com/UPSO (accessed February 11, 2012). |
| CBE/CSE | UPSO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/UPSO. |
| Bluebook | UPSO, http://www.acronymgeek.com/UPSO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UPSO, http://www.acronymgeek.com/UPSO (optional description here) (as of Feb. 11, 2012, 13:18). |
| AMA | UPSO. Acronym Geek. February 11, 2012, 13:18. Available at: http://www.acronymgeek.com/UPSO. Accessed February 11, 2012, 13:18. |