| APA | USPN. (2012, February 16). In Acronym Geek. Retrieved 21:29, February 16, 2012, from http://www.acronymgeek.com/USPN |
| MLA | "USPN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/USPN>. |
| MHRA | 'USPN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/USPN> [accessed 16 February 2012] |
| Chicago | "USPN", http://www.acronymgeek.com/USPN (accessed February 16, 2012). |
| CBE/CSE | USPN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/USPN. |
| Bluebook | USPN, http://www.acronymgeek.com/USPN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, USPN, http://www.acronymgeek.com/USPN (optional description here) (as of Feb. 16, 2012, 21:29). |
| AMA | USPN. Acronym Geek. February 16, 2012, 21:29. Available at: http://www.acronymgeek.com/USPN. Accessed February 16, 2012, 21:29. |