| APA | PSU. (2012, February 13). In Acronym Geek. Retrieved 21:09, February 13, 2012, from http://www.acronymgeek.com/PSU |
| MLA | "PSU." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PSU>. |
| MHRA | 'PSU', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PSU> [accessed 13 February 2012] |
| Chicago | "PSU", http://www.acronymgeek.com/PSU (accessed February 13, 2012). |
| CBE/CSE | PSU [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PSU. |
| Bluebook | PSU, http://www.acronymgeek.com/PSU (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PSU, http://www.acronymgeek.com/PSU (optional description here) (as of Feb. 13, 2012, 21:09). |
| AMA | PSU. Acronym Geek. February 13, 2012, 21:09. Available at: http://www.acronymgeek.com/PSU. Accessed February 13, 2012, 21:09. |